diff --git a/mayan/apps/acls/south_migrations/0001_initial.py b/mayan/apps/acls/south_migrations/0001_initial.py
index 1870903d8e..00cb7651e9 100644
--- a/mayan/apps/acls/south_migrations/0001_initial.py
+++ b/mayan/apps/acls/south_migrations/0001_initial.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/acls/south_migrations/0002_auto__del_field_creatorsingleton_lock_id.py b/mayan/apps/acls/south_migrations/0002_auto__del_field_creatorsingleton_lock_id.py
index ac7fd8260e..2027ad68d4 100644
--- a/mayan/apps/acls/south_migrations/0002_auto__del_field_creatorsingleton_lock_id.py
+++ b/mayan/apps/acls/south_migrations/0002_auto__del_field_creatorsingleton_lock_id.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/checkouts/south_migrations/0001_initial.py b/mayan/apps/checkouts/south_migrations/0001_initial.py
index 16732c017e..ac3e7abb0c 100644
--- a/mayan/apps/checkouts/south_migrations/0001_initial.py
+++ b/mayan/apps/checkouts/south_migrations/0001_initial.py
@@ -2,7 +2,6 @@
 from south.utils import datetime_utils as datetime
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/checkouts/south_migrations/0002_auto__add_field_documentcheckout_user_content_type__add_field_document.py b/mayan/apps/checkouts/south_migrations/0002_auto__add_field_documentcheckout_user_content_type__add_field_document.py
index a883b85958..b1b4721896 100644
--- a/mayan/apps/checkouts/south_migrations/0002_auto__add_field_documentcheckout_user_content_type__add_field_document.py
+++ b/mayan/apps/checkouts/south_migrations/0002_auto__add_field_documentcheckout_user_content_type__add_field_document.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/checkouts/south_migrations/0003_auto__chg_field_documentcheckout_checkout_datetime.py b/mayan/apps/checkouts/south_migrations/0003_auto__chg_field_documentcheckout_checkout_datetime.py
index 8e85077c73..0d0ff928d4 100644
--- a/mayan/apps/checkouts/south_migrations/0003_auto__chg_field_documentcheckout_checkout_datetime.py
+++ b/mayan/apps/checkouts/south_migrations/0003_auto__chg_field_documentcheckout_checkout_datetime.py
@@ -2,7 +2,6 @@
 from south.utils import datetime_utils as datetime
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/common/south_migrations/0001_initial.py b/mayan/apps/common/south_migrations/0001_initial.py
index 18562a7fea..0a1604d029 100644
--- a/mayan/apps/common/south_migrations/0001_initial.py
+++ b/mayan/apps/common/south_migrations/0001_initial.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/common/south_migrations/0002_auto__add_autoadminsingleton.py b/mayan/apps/common/south_migrations/0002_auto__add_autoadminsingleton.py
index a0c168d8c4..0ef513cf38 100644
--- a/mayan/apps/common/south_migrations/0002_auto__add_autoadminsingleton.py
+++ b/mayan/apps/common/south_migrations/0002_auto__add_autoadminsingleton.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/common/south_migrations/0003_auto__del_field_autoadminsingleton_original_auto_admin_password__del_f.py b/mayan/apps/common/south_migrations/0003_auto__del_field_autoadminsingleton_original_auto_admin_password__del_f.py
index 345600db63..8157d80233 100644
--- a/mayan/apps/common/south_migrations/0003_auto__del_field_autoadminsingleton_original_auto_admin_password__del_f.py
+++ b/mayan/apps/common/south_migrations/0003_auto__del_field_autoadminsingleton_original_auto_admin_password__del_f.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/common/south_migrations/0004_auto__del_field_autoadminsingleton_auto_admin_password__del_field_auto.py b/mayan/apps/common/south_migrations/0004_auto__del_field_autoadminsingleton_auto_admin_password__del_field_auto.py
index da7f16bc27..dacc65efcb 100644
--- a/mayan/apps/common/south_migrations/0004_auto__del_field_autoadminsingleton_auto_admin_password__del_field_auto.py
+++ b/mayan/apps/common/south_migrations/0004_auto__del_field_autoadminsingleton_auto_admin_password__del_field_auto.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/common/south_migrations/0005_auto__del_field_autoadminsingleton_lock_id__del_field_anonymoususersin.py b/mayan/apps/common/south_migrations/0005_auto__del_field_autoadminsingleton_lock_id__del_field_anonymoususersin.py
index a6d9253227..e31def7ca1 100644
--- a/mayan/apps/common/south_migrations/0005_auto__del_field_autoadminsingleton_lock_id__del_field_anonymoususersin.py
+++ b/mayan/apps/common/south_migrations/0005_auto__del_field_autoadminsingleton_lock_id__del_field_anonymoususersin.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/common/south_migrations/0006_auto__add_shareduploadedfile.py b/mayan/apps/common/south_migrations/0006_auto__add_shareduploadedfile.py
index c0d64bcf26..672eb0f83b 100644
--- a/mayan/apps/common/south_migrations/0006_auto__add_shareduploadedfile.py
+++ b/mayan/apps/common/south_migrations/0006_auto__add_shareduploadedfile.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/common/south_migrations/0007_auto__add_field_shareduploadedfile_filename.py b/mayan/apps/common/south_migrations/0007_auto__add_field_shareduploadedfile_filename.py
index a835618ad5..408fdfa1cf 100644
--- a/mayan/apps/common/south_migrations/0007_auto__add_field_shareduploadedfile_filename.py
+++ b/mayan/apps/common/south_migrations/0007_auto__add_field_shareduploadedfile_filename.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/common/south_migrations/0008_auto__add_field_shareduploadedfile_datatime.py b/mayan/apps/common/south_migrations/0008_auto__add_field_shareduploadedfile_datatime.py
index 8548c50407..1a4ac696ec 100644
--- a/mayan/apps/common/south_migrations/0008_auto__add_field_shareduploadedfile_datatime.py
+++ b/mayan/apps/common/south_migrations/0008_auto__add_field_shareduploadedfile_datatime.py
@@ -2,7 +2,6 @@
 from south.utils import datetime_utils as datetime
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/common/south_migrations/0009_auto__add_userlocaleprofile.py b/mayan/apps/common/south_migrations/0009_auto__add_userlocaleprofile.py
index 030b9e3395..4707812e9b 100644
--- a/mayan/apps/common/south_migrations/0009_auto__add_userlocaleprofile.py
+++ b/mayan/apps/common/south_migrations/0009_auto__add_userlocaleprofile.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/common/south_migrations/0010_create_locale_profiles.py b/mayan/apps/common/south_migrations/0010_create_locale_profiles.py
index 2c8099d470..00fa273685 100644
--- a/mayan/apps/common/south_migrations/0010_create_locale_profiles.py
+++ b/mayan/apps/common/south_migrations/0010_create_locale_profiles.py
@@ -1,7 +1,5 @@
 # -*- coding: utf-8 -*-
-from south.db import db
 from south.v2 import DataMigration
-from django.db import models
 
 
 class Migration(DataMigration):
diff --git a/mayan/apps/converter/models.py b/mayan/apps/converter/models.py
index 71a8362390..8f1065d8f9 100644
--- a/mayan/apps/converter/models.py
+++ b/mayan/apps/converter/models.py
@@ -1,3 +1 @@
-from django.db import models
-
-# Create your models here.
+from django.db import models  # NOQA
diff --git a/mayan/apps/document_acls/models.py b/mayan/apps/document_acls/models.py
index 71a8362390..8f1065d8f9 100644
--- a/mayan/apps/document_acls/models.py
+++ b/mayan/apps/document_acls/models.py
@@ -1,3 +1 @@
-from django.db import models
-
-# Create your models here.
+from django.db import models  # NOQA
diff --git a/mayan/apps/document_comments/models.py b/mayan/apps/document_comments/models.py
index 71a8362390..8f1065d8f9 100644
--- a/mayan/apps/document_comments/models.py
+++ b/mayan/apps/document_comments/models.py
@@ -1,3 +1 @@
-from django.db import models
-
-# Create your models here.
+from django.db import models  # NOQA
diff --git a/mayan/apps/document_indexing/admin.py b/mayan/apps/document_indexing/admin.py
index 6c32a8ce3b..d9cd4445f1 100644
--- a/mayan/apps/document_indexing/admin.py
+++ b/mayan/apps/document_indexing/admin.py
@@ -3,7 +3,7 @@ from __future__ import unicode_literals
 from django.contrib import admin
 from django.utils.translation import ugettext_lazy as _
 
-from .models import Index, IndexInstanceNode, IndexTemplateNode
+from .models import Index, IndexTemplateNode
 
 
 class IndexTemplateNodeInline(admin.StackedInline):
diff --git a/mayan/apps/document_indexing/south_migrations/0004_auto__add_documentrenamecount.py b/mayan/apps/document_indexing/south_migrations/0004_auto__add_documentrenamecount.py
index d013d02559..38a2fd4baf 100644
--- a/mayan/apps/document_indexing/south_migrations/0004_auto__add_documentrenamecount.py
+++ b/mayan/apps/document_indexing/south_migrations/0004_auto__add_documentrenamecount.py
@@ -1,7 +1,6 @@
 # encoding: utf-8
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/document_indexing/south_migrations/0005_auto__add_unique_index_name__add_unique_index_title.py b/mayan/apps/document_indexing/south_migrations/0005_auto__add_unique_index_name__add_unique_index_title.py
index 25c35e0eff..4b6d55504b 100644
--- a/mayan/apps/document_indexing/south_migrations/0005_auto__add_unique_index_name__add_unique_index_title.py
+++ b/mayan/apps/document_indexing/south_migrations/0005_auto__add_unique_index_name__add_unique_index_title.py
@@ -1,7 +1,6 @@
 # encoding: utf-8
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/document_indexing/south_migrations/0007_auto__del_documentrenamecount.py b/mayan/apps/document_indexing/south_migrations/0007_auto__del_documentrenamecount.py
index 857060e9c4..f8d7dfffe6 100644
--- a/mayan/apps/document_indexing/south_migrations/0007_auto__del_documentrenamecount.py
+++ b/mayan/apps/document_indexing/south_migrations/0007_auto__del_documentrenamecount.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/document_signatures/south_migrations/0001_initial.py b/mayan/apps/document_signatures/south_migrations/0001_initial.py
index ccf93779cc..44a3ece35a 100644
--- a/mayan/apps/document_signatures/south_migrations/0001_initial.py
+++ b/mayan/apps/document_signatures/south_migrations/0001_initial.py
@@ -1,7 +1,6 @@
 # encoding: utf-8
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/document_signatures/south_migrations/0002_move_signatures_to_new_app.py b/mayan/apps/document_signatures/south_migrations/0002_move_signatures_to_new_app.py
index d0ee35c5e8..8ce9782b29 100644
--- a/mayan/apps/document_signatures/south_migrations/0002_move_signatures_to_new_app.py
+++ b/mayan/apps/document_signatures/south_migrations/0002_move_signatures_to_new_app.py
@@ -1,7 +1,5 @@
 # encoding: utf-8
-from south.db import db
 from south.v2 import DataMigration
-from django.db import models
 
 
 class Migration(DataMigration):
diff --git a/mayan/apps/document_signatures/south_migrations/0003_auto__add_field_documentversionsignature_has_embedded_signature.py b/mayan/apps/document_signatures/south_migrations/0003_auto__add_field_documentversionsignature_has_embedded_signature.py
index f08bca31d4..a5ad870d64 100644
--- a/mayan/apps/document_signatures/south_migrations/0003_auto__add_field_documentversionsignature_has_embedded_signature.py
+++ b/mayan/apps/document_signatures/south_migrations/0003_auto__add_field_documentversionsignature_has_embedded_signature.py
@@ -1,7 +1,6 @@
 # encoding: utf-8
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/document_signatures/south_migrations/0004_embedded_signature_state_copy.py b/mayan/apps/document_signatures/south_migrations/0004_embedded_signature_state_copy.py
index f35aaca3b3..5e46f6643e 100644
--- a/mayan/apps/document_signatures/south_migrations/0004_embedded_signature_state_copy.py
+++ b/mayan/apps/document_signatures/south_migrations/0004_embedded_signature_state_copy.py
@@ -1,7 +1,5 @@
 # encoding: utf-8
-from south.db import db
 from south.v2 import DataMigration
-from django.db import models
 
 
 class Migration(DataMigration):
diff --git a/mayan/apps/document_signatures/south_migrations/0005_auto__del_field_documentversionsignature_signature_state.py b/mayan/apps/document_signatures/south_migrations/0005_auto__del_field_documentversionsignature_signature_state.py
index 236efa8d3d..249a2b0c3d 100644
--- a/mayan/apps/document_signatures/south_migrations/0005_auto__del_field_documentversionsignature_signature_state.py
+++ b/mayan/apps/document_signatures/south_migrations/0005_auto__del_field_documentversionsignature_signature_state.py
@@ -1,7 +1,6 @@
 # encoding: utf-8
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/document_states/south_migrations/0001_initial.py b/mayan/apps/document_states/south_migrations/0001_initial.py
index c766932295..48c53fe2c0 100644
--- a/mayan/apps/document_states/south_migrations/0001_initial.py
+++ b/mayan/apps/document_states/south_migrations/0001_initial.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/document_states/south_migrations/0002_auto__add_field_workflowtransition_workflow.py b/mayan/apps/document_states/south_migrations/0002_auto__add_field_workflowtransition_workflow.py
index 3a7faaad6b..dd755db9cc 100644
--- a/mayan/apps/document_states/south_migrations/0002_auto__add_field_workflowtransition_workflow.py
+++ b/mayan/apps/document_states/south_migrations/0002_auto__add_field_workflowtransition_workflow.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/document_states/south_migrations/0003_auto__add_unique_workflowtransition_workflow_origin_state_destination_.py b/mayan/apps/document_states/south_migrations/0003_auto__add_unique_workflowtransition_workflow_origin_state_destination_.py
index d7b9a2cbf2..f6fd8dbad9 100644
--- a/mayan/apps/document_states/south_migrations/0003_auto__add_unique_workflowtransition_workflow_origin_state_destination_.py
+++ b/mayan/apps/document_states/south_migrations/0003_auto__add_unique_workflowtransition_workflow_origin_state_destination_.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/document_states/south_migrations/0004_auto__del_field_workflowinstancelogentry_document__del_field_workflowi.py b/mayan/apps/document_states/south_migrations/0004_auto__del_field_workflowinstancelogentry_document__del_field_workflowi.py
index d78cb33f4d..be034667c5 100644
--- a/mayan/apps/document_states/south_migrations/0004_auto__del_field_workflowinstancelogentry_document__del_field_workflowi.py
+++ b/mayan/apps/document_states/south_migrations/0004_auto__del_field_workflowinstancelogentry_document__del_field_workflowi.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/document_states/south_migrations/0005_auto__del_unique_workflowstate_label__add_unique_workflowstate_workflo.py b/mayan/apps/document_states/south_migrations/0005_auto__del_unique_workflowstate_label__add_unique_workflowstate_workflo.py
index c47f132ba5..26f39a854d 100644
--- a/mayan/apps/document_states/south_migrations/0005_auto__del_unique_workflowstate_label__add_unique_workflowstate_workflo.py
+++ b/mayan/apps/document_states/south_migrations/0005_auto__del_unique_workflowstate_label__add_unique_workflowstate_workflo.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/document_states/south_migrations/0006_auto__del_unique_workflowtransition_label__del_unique_workflowtransiti.py b/mayan/apps/document_states/south_migrations/0006_auto__del_unique_workflowtransition_label__del_unique_workflowtransiti.py
index 035cf2aeed..6d7f1f6955 100644
--- a/mayan/apps/document_states/south_migrations/0006_auto__del_unique_workflowtransition_label__del_unique_workflowtransiti.py
+++ b/mayan/apps/document_states/south_migrations/0006_auto__del_unique_workflowtransition_label__del_unique_workflowtransiti.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/document_states/south_migrations/0008_auto__add_field_workflowinstancelogentry_user__add_field_workflowinsta.py b/mayan/apps/document_states/south_migrations/0008_auto__add_field_workflowinstancelogentry_user__add_field_workflowinsta.py
index 69809d7fed..24e103f59a 100644
--- a/mayan/apps/document_states/south_migrations/0008_auto__add_field_workflowinstancelogentry_user__add_field_workflowinsta.py
+++ b/mayan/apps/document_states/south_migrations/0008_auto__add_field_workflowinstancelogentry_user__add_field_workflowinsta.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/document_states/south_migrations/0009_auto__add_index_workflowinstancelogentry_datetime.py b/mayan/apps/document_states/south_migrations/0009_auto__add_index_workflowinstancelogentry_datetime.py
index 57772863c5..ce27668823 100644
--- a/mayan/apps/document_states/south_migrations/0009_auto__add_index_workflowinstancelogentry_datetime.py
+++ b/mayan/apps/document_states/south_migrations/0009_auto__add_index_workflowinstancelogentry_datetime.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/documents/south_migrations/0001_initial.py b/mayan/apps/documents/south_migrations/0001_initial.py
index 75ee136945..c67c538163 100644
--- a/mayan/apps/documents/south_migrations/0001_initial.py
+++ b/mayan/apps/documents/south_migrations/0001_initial.py
@@ -1,7 +1,6 @@
 # encoding: utf-8
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/documents/south_migrations/0002_filename_extension_merge.py b/mayan/apps/documents/south_migrations/0002_filename_extension_merge.py
index 13ca9dedbd..7ffe10d451 100644
--- a/mayan/apps/documents/south_migrations/0002_filename_extension_merge.py
+++ b/mayan/apps/documents/south_migrations/0002_filename_extension_merge.py
@@ -1,7 +1,6 @@
 # encoding: utf-8
 import os
 from south.v2 import DataMigration
-from django.db import models
 
 
 class Migration(DataMigration):
diff --git a/mayan/apps/documents/south_migrations/0003_auto__del_field_document_file_extension.py b/mayan/apps/documents/south_migrations/0003_auto__del_field_document_file_extension.py
index 6e12ad5bdf..1af93ba39e 100644
--- a/mayan/apps/documents/south_migrations/0003_auto__del_field_document_file_extension.py
+++ b/mayan/apps/documents/south_migrations/0003_auto__del_field_document_file_extension.py
@@ -1,7 +1,6 @@
 # encoding: utf-8
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/documents/south_migrations/0004_auto__add_documentversion__add_unique_documentversion_document_mayor_m.py b/mayan/apps/documents/south_migrations/0004_auto__add_documentversion__add_unique_documentversion_document_mayor_m.py
index 386f12eb68..243d6f8b0f 100644
--- a/mayan/apps/documents/south_migrations/0004_auto__add_documentversion__add_unique_documentversion_document_mayor_m.py
+++ b/mayan/apps/documents/south_migrations/0004_auto__add_documentversion__add_unique_documentversion_document_mayor_m.py
@@ -1,7 +1,6 @@
 # encoding: utf-8
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/documents/south_migrations/0005_document_versions.py b/mayan/apps/documents/south_migrations/0005_document_versions.py
index f68ac355bc..942ede042a 100644
--- a/mayan/apps/documents/south_migrations/0005_document_versions.py
+++ b/mayan/apps/documents/south_migrations/0005_document_versions.py
@@ -1,6 +1,5 @@
 # encoding: utf-8
 from south.v2 import DataMigration
-from django.db import models
 
 
 class Migration(DataMigration):
diff --git a/mayan/apps/documents/south_migrations/0006_fix_invalid_document_version_id_keys.py b/mayan/apps/documents/south_migrations/0006_fix_invalid_document_version_id_keys.py
index f263c0a1c1..35e1645c31 100644
--- a/mayan/apps/documents/south_migrations/0006_fix_invalid_document_version_id_keys.py
+++ b/mayan/apps/documents/south_migrations/0006_fix_invalid_document_version_id_keys.py
@@ -1,6 +1,5 @@
 # encoding: utf-8
 from south.v2 import DataMigration
-from django.db import models
 
 
 class Migration(DataMigration):
diff --git a/mayan/apps/documents/south_migrations/0007_remove_old_file_fields.py b/mayan/apps/documents/south_migrations/0007_remove_old_file_fields.py
index cefb4900ba..82b1fac6ef 100644
--- a/mayan/apps/documents/south_migrations/0007_remove_old_file_fields.py
+++ b/mayan/apps/documents/south_migrations/0007_remove_old_file_fields.py
@@ -2,7 +2,6 @@
 import datetime
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/documents/south_migrations/0008_fix_mayor_field_name.py b/mayan/apps/documents/south_migrations/0008_fix_mayor_field_name.py
index c4e9335cb3..9efe63e45c 100644
--- a/mayan/apps/documents/south_migrations/0008_fix_mayor_field_name.py
+++ b/mayan/apps/documents/south_migrations/0008_fix_mayor_field_name.py
@@ -1,7 +1,6 @@
 # encoding: utf-8
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/documents/south_migrations/0009_add_comment_field.py b/mayan/apps/documents/south_migrations/0009_add_comment_field.py
index 552408cfd1..67523d9854 100644
--- a/mayan/apps/documents/south_migrations/0009_add_comment_field.py
+++ b/mayan/apps/documents/south_migrations/0009_add_comment_field.py
@@ -1,7 +1,6 @@
 # encoding: utf-8
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/documents/south_migrations/0010_auto__chg_field_document_date_added.py b/mayan/apps/documents/south_migrations/0010_auto__chg_field_document_date_added.py
index 676ca26257..4a11b0cd1b 100644
--- a/mayan/apps/documents/south_migrations/0010_auto__chg_field_document_date_added.py
+++ b/mayan/apps/documents/south_migrations/0010_auto__chg_field_document_date_added.py
@@ -1,7 +1,6 @@
 # encoding: utf-8
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/documents/south_migrations/0011_auto__add_field_documentversion_signature_state.py b/mayan/apps/documents/south_migrations/0011_auto__add_field_documentversion_signature_state.py
index d453361e95..8ed61017eb 100644
--- a/mayan/apps/documents/south_migrations/0011_auto__add_field_documentversion_signature_state.py
+++ b/mayan/apps/documents/south_migrations/0011_auto__add_field_documentversion_signature_state.py
@@ -1,7 +1,6 @@
 # encoding: utf-8
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/documents/south_migrations/0012_auto__add_field_documentversion_signature_file.py b/mayan/apps/documents/south_migrations/0012_auto__add_field_documentversion_signature_file.py
index fab669d478..e92f52592f 100644
--- a/mayan/apps/documents/south_migrations/0012_auto__add_field_documentversion_signature_file.py
+++ b/mayan/apps/documents/south_migrations/0012_auto__add_field_documentversion_signature_file.py
@@ -1,7 +1,6 @@
 # encoding: utf-8
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/documents/south_migrations/0013_auto__del_field_documentversion_signature_file__del_field_documentvers.py b/mayan/apps/documents/south_migrations/0013_auto__del_field_documentversion_signature_file__del_field_documentvers.py
index 36777ce5bf..b798d608f0 100644
--- a/mayan/apps/documents/south_migrations/0013_auto__del_field_documentversion_signature_file__del_field_documentvers.py
+++ b/mayan/apps/documents/south_migrations/0013_auto__del_field_documentversion_signature_file__del_field_documentvers.py
@@ -1,7 +1,6 @@
 # encoding: utf-8
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/documents/south_migrations/0014_change_document_mimetype_encoding_null.py b/mayan/apps/documents/south_migrations/0014_change_document_mimetype_encoding_null.py
index fe131187d8..e31ade6942 100644
--- a/mayan/apps/documents/south_migrations/0014_change_document_mimetype_encoding_null.py
+++ b/mayan/apps/documents/south_migrations/0014_change_document_mimetype_encoding_null.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/documents/south_migrations/0015_auto__add_unique_documenttype_name.py b/mayan/apps/documents/south_migrations/0015_auto__add_unique_documenttype_name.py
index 96b852919d..62cff2d39c 100644
--- a/mayan/apps/documents/south_migrations/0015_auto__add_unique_documenttype_name.py
+++ b/mayan/apps/documents/south_migrations/0015_auto__add_unique_documenttype_name.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/documents/south_migrations/0017_auto__chg_field_documentversion_mimetype.py b/mayan/apps/documents/south_migrations/0017_auto__chg_field_documentversion_mimetype.py
index 3ef8028a3b..63d6252f0a 100644
--- a/mayan/apps/documents/south_migrations/0017_auto__chg_field_documentversion_mimetype.py
+++ b/mayan/apps/documents/south_migrations/0017_auto__chg_field_documentversion_mimetype.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/documents/south_migrations/0018_auto__chg_field_documentpage_page_label.py b/mayan/apps/documents/south_migrations/0018_auto__chg_field_documentpage_page_label.py
index a8e54d8059..bffe5029b3 100644
--- a/mayan/apps/documents/south_migrations/0018_auto__chg_field_documentpage_page_label.py
+++ b/mayan/apps/documents/south_migrations/0018_auto__chg_field_documentpage_page_label.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/documents/south_migrations/0019_auto__add_index_documentversion_timestamp.py b/mayan/apps/documents/south_migrations/0019_auto__add_index_documentversion_timestamp.py
index 460fa69a78..e7047f915f 100644
--- a/mayan/apps/documents/south_migrations/0019_auto__add_index_documentversion_timestamp.py
+++ b/mayan/apps/documents/south_migrations/0019_auto__add_index_documentversion_timestamp.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/documents/south_migrations/0020_auto__chg_field_recentdocument_datetime_accessed__chg_field_documentve.py b/mayan/apps/documents/south_migrations/0020_auto__chg_field_recentdocument_datetime_accessed__chg_field_documentve.py
index aef1915958..25ded8c6c3 100644
--- a/mayan/apps/documents/south_migrations/0020_auto__chg_field_recentdocument_datetime_accessed__chg_field_documentve.py
+++ b/mayan/apps/documents/south_migrations/0020_auto__chg_field_recentdocument_datetime_accessed__chg_field_documentve.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/documents/south_migrations/0021_auto__del_field_documentversion_serial__del_field_documentversion_rele.py b/mayan/apps/documents/south_migrations/0021_auto__del_field_documentversion_serial__del_field_documentversion_rele.py
index c2a2b466ea..32180609af 100644
--- a/mayan/apps/documents/south_migrations/0021_auto__del_field_documentversion_serial__del_field_documentversion_rele.py
+++ b/mayan/apps/documents/south_migrations/0021_auto__del_field_documentversion_serial__del_field_documentversion_rele.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/documents/south_migrations/0022_set_doc_type.py b/mayan/apps/documents/south_migrations/0022_set_doc_type.py
index 303228e7ec..a23176ec61 100644
--- a/mayan/apps/documents/south_migrations/0022_set_doc_type.py
+++ b/mayan/apps/documents/south_migrations/0022_set_doc_type.py
@@ -1,7 +1,5 @@
 # -*- coding: utf-8 -*-
-from south.db import db
 from south.v2 import DataMigration
-from django.db import models
 
 
 def fake_get_or_create(model, *args, **kwargs):
diff --git a/mayan/apps/documents/south_migrations/0023_auto__chg_field_document_document_type.py b/mayan/apps/documents/south_migrations/0023_auto__chg_field_document_document_type.py
index c7b2c9f3ab..519beb47d6 100644
--- a/mayan/apps/documents/south_migrations/0023_auto__chg_field_document_document_type.py
+++ b/mayan/apps/documents/south_migrations/0023_auto__chg_field_document_document_type.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/documents/south_migrations/0024_auto__add_field_documenttype_ocr.py b/mayan/apps/documents/south_migrations/0024_auto__add_field_documenttype_ocr.py
index 5c28237cb4..c6a20cb03f 100644
--- a/mayan/apps/documents/south_migrations/0024_auto__add_field_documenttype_ocr.py
+++ b/mayan/apps/documents/south_migrations/0024_auto__add_field_documenttype_ocr.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/documents/south_migrations/0025_auto__add_field_document_language.py b/mayan/apps/documents/south_migrations/0025_auto__add_field_document_language.py
index 1ae4f6cfe8..11d4b20aec 100644
--- a/mayan/apps/documents/south_migrations/0025_auto__add_field_document_language.py
+++ b/mayan/apps/documents/south_migrations/0025_auto__add_field_document_language.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/documents/south_migrations/0026_auto__add_field_document_label.py b/mayan/apps/documents/south_migrations/0026_auto__add_field_document_label.py
index c4da8e0910..fb7c783ff9 100644
--- a/mayan/apps/documents/south_migrations/0026_auto__add_field_document_label.py
+++ b/mayan/apps/documents/south_migrations/0026_auto__add_field_document_label.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/documents/south_migrations/0027_move_filename_to_label.py b/mayan/apps/documents/south_migrations/0027_move_filename_to_label.py
index 8d8b810982..fc2f0f1232 100644
--- a/mayan/apps/documents/south_migrations/0027_move_filename_to_label.py
+++ b/mayan/apps/documents/south_migrations/0027_move_filename_to_label.py
@@ -1,7 +1,5 @@
 # -*- coding: utf-8 -*-
-from south.db import db
 from south.v2 import DataMigration
-from django.db import models
 
 
 class Migration(DataMigration):
diff --git a/mayan/apps/documents/south_migrations/0028_auto__del_field_documentversion_filename.py b/mayan/apps/documents/south_migrations/0028_auto__del_field_documentversion_filename.py
index 72b28e6fa2..6103a615c2 100644
--- a/mayan/apps/documents/south_migrations/0028_auto__del_field_documentversion_filename.py
+++ b/mayan/apps/documents/south_migrations/0028_auto__del_field_documentversion_filename.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/documents/south_migrations/0029_auto__del_field_documentversion_major__del_field_documentversion_micro.py b/mayan/apps/documents/south_migrations/0029_auto__del_field_documentversion_major__del_field_documentversion_micro.py
index 61e204dc83..1bfc071f74 100644
--- a/mayan/apps/documents/south_migrations/0029_auto__del_field_documentversion_major__del_field_documentversion_micro.py
+++ b/mayan/apps/documents/south_migrations/0029_auto__del_field_documentversion_major__del_field_documentversion_micro.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/documents/south_migrations/0030_auto__add_unique_documenttypefilename_document_type_filename.py b/mayan/apps/documents/south_migrations/0030_auto__add_unique_documenttypefilename_document_type_filename.py
index fced48ac6b..a681a55170 100644
--- a/mayan/apps/documents/south_migrations/0030_auto__add_unique_documenttypefilename_document_type_filename.py
+++ b/mayan/apps/documents/south_migrations/0030_auto__add_unique_documenttypefilename_document_type_filename.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/documents/south_migrations/0031_remove_orphan_documents.py b/mayan/apps/documents/south_migrations/0031_remove_orphan_documents.py
index 7b2d4ed48e..bd30c9c06c 100644
--- a/mayan/apps/documents/south_migrations/0031_remove_orphan_documents.py
+++ b/mayan/apps/documents/south_migrations/0031_remove_orphan_documents.py
@@ -1,7 +1,5 @@
 # -*- coding: utf-8 -*-
-from south.db import db
 from south.v2 import DataMigration
-from django.db import models
 
 
 class Migration(DataMigration):
diff --git a/mayan/apps/documents/tasks.py b/mayan/apps/documents/tasks.py
index 2b501819d7..45e18b4cf5 100644
--- a/mayan/apps/documents/tasks.py
+++ b/mayan/apps/documents/tasks.py
@@ -8,7 +8,6 @@ from django.core.files import File
 from mayan.celery import app
 
 from common.models import SharedUploadedFile
-from converter.exceptions import ConvertError
 
 from .models import Document, DocumentType, DocumentVersion
 
diff --git a/mayan/apps/dynamic_search/south_migrations/0001_initial.py b/mayan/apps/dynamic_search/south_migrations/0001_initial.py
index dcdae0b4ff..1df7a964fe 100644
--- a/mayan/apps/dynamic_search/south_migrations/0001_initial.py
+++ b/mayan/apps/dynamic_search/south_migrations/0001_initial.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/dynamic_search/south_migrations/0002_auto__chg_field_recentsearch_datetime_created__add_index_recentsearch_.py b/mayan/apps/dynamic_search/south_migrations/0002_auto__chg_field_recentsearch_datetime_created__add_index_recentsearch_.py
index 6f34c7eedf..5f0d643cdf 100644
--- a/mayan/apps/dynamic_search/south_migrations/0002_auto__chg_field_recentsearch_datetime_created__add_index_recentsearch_.py
+++ b/mayan/apps/dynamic_search/south_migrations/0002_auto__chg_field_recentsearch_datetime_created__add_index_recentsearch_.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/events/south_migrations/0001_initial.py b/mayan/apps/events/south_migrations/0001_initial.py
index c3d85fd450..65b0e614cf 100644
--- a/mayan/apps/events/south_migrations/0001_initial.py
+++ b/mayan/apps/events/south_migrations/0001_initial.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/events/south_migrations/0002_migrate_history_data.py b/mayan/apps/events/south_migrations/0002_migrate_history_data.py
index 7f39550f18..cfd7b54f96 100644
--- a/mayan/apps/events/south_migrations/0002_migrate_history_data.py
+++ b/mayan/apps/events/south_migrations/0002_migrate_history_data.py
@@ -1,9 +1,7 @@
 # -*- coding: utf-8 -*-
 import json
 
-from south.db import db
 from south.v2 import DataMigration
-from django.db import models
 
 type_equivalence = {
     'documents.document_created': 'documents_document_create',
diff --git a/mayan/apps/folders/south_migrations/0001_initial.py b/mayan/apps/folders/south_migrations/0001_initial.py
index 25babd00a8..d6cee4a7d1 100644
--- a/mayan/apps/folders/south_migrations/0001_initial.py
+++ b/mayan/apps/folders/south_migrations/0001_initial.py
@@ -1,7 +1,6 @@
 # encoding: utf-8
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/folders/south_migrations/0002_increase_title_size.py b/mayan/apps/folders/south_migrations/0002_increase_title_size.py
index eeee5ed480..253d060db0 100644
--- a/mayan/apps/folders/south_migrations/0002_increase_title_size.py
+++ b/mayan/apps/folders/south_migrations/0002_increase_title_size.py
@@ -1,7 +1,6 @@
 # encoding: utf-8
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/folders/south_migrations/0004_m2m_fields.py b/mayan/apps/folders/south_migrations/0004_m2m_fields.py
index 6ee979bbb2..7e54e0c16a 100644
--- a/mayan/apps/folders/south_migrations/0004_m2m_fields.py
+++ b/mayan/apps/folders/south_migrations/0004_m2m_fields.py
@@ -1,7 +1,5 @@
 # -*- coding: utf-8 -*-
-from south.db import db
 from south.v2 import DataMigration
-from django.db import models
 
 
 class Migration(DataMigration):
diff --git a/mayan/apps/folders/south_migrations/0005_auto__del_folderdocument.py b/mayan/apps/folders/south_migrations/0005_auto__del_folderdocument.py
index 38cfb44e84..59a1fa8cff 100644
--- a/mayan/apps/folders/south_migrations/0005_auto__del_folderdocument.py
+++ b/mayan/apps/folders/south_migrations/0005_auto__del_folderdocument.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/folders/south_migrations/0006_auto__chg_field_folder_datetime_created.py b/mayan/apps/folders/south_migrations/0006_auto__chg_field_folder_datetime_created.py
index e1a36491cd..2d1ade29a5 100644
--- a/mayan/apps/folders/south_migrations/0006_auto__chg_field_folder_datetime_created.py
+++ b/mayan/apps/folders/south_migrations/0006_auto__chg_field_folder_datetime_created.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/history/models.py b/mayan/apps/history/models.py
index 137941ffae..8f1065d8f9 100644
--- a/mayan/apps/history/models.py
+++ b/mayan/apps/history/models.py
@@ -1 +1 @@
-from django.db import models
+from django.db import models  # NOQA
diff --git a/mayan/apps/history/south_migrations/0001_initial.py b/mayan/apps/history/south_migrations/0001_initial.py
index 6649ea1f20..f4992f642f 100644
--- a/mayan/apps/history/south_migrations/0001_initial.py
+++ b/mayan/apps/history/south_migrations/0001_initial.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/history/south_migrations/0002_auto__chg_field_history_datetime.py b/mayan/apps/history/south_migrations/0002_auto__chg_field_history_datetime.py
index e76983e6ae..30e474c1d0 100644
--- a/mayan/apps/history/south_migrations/0002_auto__chg_field_history_datetime.py
+++ b/mayan/apps/history/south_migrations/0002_auto__chg_field_history_datetime.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/history/south_migrations/0003_auto__del_history__del_historytype__del_unique_historytype_namespace_n.py b/mayan/apps/history/south_migrations/0003_auto__del_history__del_historytype__del_unique_historytype_namespace_n.py
index 67d91cf3fd..02e6503425 100644
--- a/mayan/apps/history/south_migrations/0003_auto__del_history__del_historytype__del_unique_historytype_namespace_n.py
+++ b/mayan/apps/history/south_migrations/0003_auto__del_history__del_historytype__del_unique_historytype_namespace_n.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/installation/south_migrations/0001_initial.py b/mayan/apps/installation/south_migrations/0001_initial.py
index 8c56a74e46..3dc105723d 100644
--- a/mayan/apps/installation/south_migrations/0001_initial.py
+++ b/mayan/apps/installation/south_migrations/0001_initial.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/installation/south_migrations/0002_auto__del_field_installation_lock_id.py b/mayan/apps/installation/south_migrations/0002_auto__del_field_installation_lock_id.py
index 646772199d..6aca7461d2 100644
--- a/mayan/apps/installation/south_migrations/0002_auto__del_field_installation_lock_id.py
+++ b/mayan/apps/installation/south_migrations/0002_auto__del_field_installation_lock_id.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/installation/south_migrations/0003_auto__del_field_installation_is_first_run.py b/mayan/apps/installation/south_migrations/0003_auto__del_field_installation_is_first_run.py
index c968023f57..5e89faa86f 100644
--- a/mayan/apps/installation/south_migrations/0003_auto__del_field_installation_is_first_run.py
+++ b/mayan/apps/installation/south_migrations/0003_auto__del_field_installation_is_first_run.py
@@ -1,8 +1,6 @@
 # -*- coding: utf-8 -*-
-from south.utils import datetime_utils as datetime
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/linking/south_migrations/0001_initial.py b/mayan/apps/linking/south_migrations/0001_initial.py
index 7af48b8ca1..3468118269 100644
--- a/mayan/apps/linking/south_migrations/0001_initial.py
+++ b/mayan/apps/linking/south_migrations/0001_initial.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/linking/south_migrations/0003_auto__chg_field_smartlinkcondition_foreign_document_data.py b/mayan/apps/linking/south_migrations/0003_auto__chg_field_smartlinkcondition_foreign_document_data.py
index 4d131e05b2..72e1109b76 100644
--- a/mayan/apps/linking/south_migrations/0003_auto__chg_field_smartlinkcondition_foreign_document_data.py
+++ b/mayan/apps/linking/south_migrations/0003_auto__chg_field_smartlinkcondition_foreign_document_data.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/lock_manager/south_migrations/0001_initial.py b/mayan/apps/lock_manager/south_migrations/0001_initial.py
index dd6637e508..c9d2bf2a4a 100644
--- a/mayan/apps/lock_manager/south_migrations/0001_initial.py
+++ b/mayan/apps/lock_manager/south_migrations/0001_initial.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/lock_manager/south_migrations/0002_auto__chg_field_lock_creation_datetime.py b/mayan/apps/lock_manager/south_migrations/0002_auto__chg_field_lock_creation_datetime.py
index bb5d8c25b0..11df18edae 100644
--- a/mayan/apps/lock_manager/south_migrations/0002_auto__chg_field_lock_creation_datetime.py
+++ b/mayan/apps/lock_manager/south_migrations/0002_auto__chg_field_lock_creation_datetime.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/mailer/models.py b/mayan/apps/mailer/models.py
index 71a8362390..8f1065d8f9 100644
--- a/mayan/apps/mailer/models.py
+++ b/mayan/apps/mailer/models.py
@@ -1,3 +1 @@
-from django.db import models
-
-# Create your models here.
+from django.db import models  # NOQA
diff --git a/mayan/apps/main/models.py b/mayan/apps/main/models.py
index 71a8362390..8f1065d8f9 100644
--- a/mayan/apps/main/models.py
+++ b/mayan/apps/main/models.py
@@ -1,3 +1 @@
-from django.db import models
-
-# Create your models here.
+from django.db import models  # NOQA
diff --git a/mayan/apps/metadata/south_migrations/0002_auto__add_unique_metadataset_title.py b/mayan/apps/metadata/south_migrations/0002_auto__add_unique_metadataset_title.py
index 81c8697ce6..e2f81708d2 100644
--- a/mayan/apps/metadata/south_migrations/0002_auto__add_unique_metadataset_title.py
+++ b/mayan/apps/metadata/south_migrations/0002_auto__add_unique_metadataset_title.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/metadata/south_migrations/0003_auto__chg_field_metadatatype_lookup.py b/mayan/apps/metadata/south_migrations/0003_auto__chg_field_metadatatype_lookup.py
index 7dad4102b3..cb4c0afb66 100644
--- a/mayan/apps/metadata/south_migrations/0003_auto__chg_field_metadatatype_lookup.py
+++ b/mayan/apps/metadata/south_migrations/0003_auto__chg_field_metadatatype_lookup.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/metadata/south_migrations/0005_auto__chg_field_documentmetadata_value.py b/mayan/apps/metadata/south_migrations/0005_auto__chg_field_documentmetadata_value.py
index 749b0d9ab0..ce5e4ced71 100644
--- a/mayan/apps/metadata/south_migrations/0005_auto__chg_field_documentmetadata_value.py
+++ b/mayan/apps/metadata/south_migrations/0005_auto__chg_field_documentmetadata_value.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/metadata/south_migrations/0007_auto__del_documenttypedefaults__del_documenttypemetadatatypeoptions__a.py b/mayan/apps/metadata/south_migrations/0007_auto__del_documenttypedefaults__del_documenttypemetadatatypeoptions__a.py
index 3ee5983e14..087bbfd650 100644
--- a/mayan/apps/metadata/south_migrations/0007_auto__del_documenttypedefaults__del_documenttypemetadatatypeoptions__a.py
+++ b/mayan/apps/metadata/south_migrations/0007_auto__del_documenttypedefaults__del_documenttypemetadatatypeoptions__a.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/metadata/south_migrations/0008_auto__add_unique_documenttypemetadatatype_document_type_metadata_type.py b/mayan/apps/metadata/south_migrations/0008_auto__add_unique_documenttypemetadatatype_document_type_metadata_type.py
index 5adc099a0f..a76b270720 100644
--- a/mayan/apps/metadata/south_migrations/0008_auto__add_unique_documenttypemetadatatype_document_type_metadata_type.py
+++ b/mayan/apps/metadata/south_migrations/0008_auto__add_unique_documenttypemetadatatype_document_type_metadata_type.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/metadata/south_migrations/0009_auto__chg_field_metadatatype_title.py b/mayan/apps/metadata/south_migrations/0009_auto__chg_field_metadatatype_title.py
index 01378a8b86..9bfac7b09f 100644
--- a/mayan/apps/metadata/south_migrations/0009_auto__chg_field_metadatatype_title.py
+++ b/mayan/apps/metadata/south_migrations/0009_auto__chg_field_metadatatype_title.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/metadata/south_migrations/0010_auto__add_unique_documentmetadata_document_metadata_type.py b/mayan/apps/metadata/south_migrations/0010_auto__add_unique_documentmetadata_document_metadata_type.py
index 7b6c4f4841..0da4a9385f 100644
--- a/mayan/apps/metadata/south_migrations/0010_auto__add_unique_documentmetadata_document_metadata_type.py
+++ b/mayan/apps/metadata/south_migrations/0010_auto__add_unique_documentmetadata_document_metadata_type.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/metadata/south_migrations/0011_auto__add_field_metadatatype_validation.py b/mayan/apps/metadata/south_migrations/0011_auto__add_field_metadatatype_validation.py
index 19d4ffb036..07637b3c71 100644
--- a/mayan/apps/metadata/south_migrations/0011_auto__add_field_metadatatype_validation.py
+++ b/mayan/apps/metadata/south_migrations/0011_auto__add_field_metadatatype_validation.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/mimetype/models.py b/mayan/apps/mimetype/models.py
index 71a8362390..8f1065d8f9 100644
--- a/mayan/apps/mimetype/models.py
+++ b/mayan/apps/mimetype/models.py
@@ -1,3 +1 @@
-from django.db import models
-
-# Create your models here.
+from django.db import models  # NOQA
diff --git a/mayan/apps/navigation/models.py b/mayan/apps/navigation/models.py
index 71a8362390..8f1065d8f9 100644
--- a/mayan/apps/navigation/models.py
+++ b/mayan/apps/navigation/models.py
@@ -1,3 +1 @@
-from django.db import models
-
-# Create your models here.
+from django.db import models  # NOQA
diff --git a/mayan/apps/ocr/south_migrations/0001_initial.py b/mayan/apps/ocr/south_migrations/0001_initial.py
index 08f4511aa8..ffd1bde3c4 100644
--- a/mayan/apps/ocr/south_migrations/0001_initial.py
+++ b/mayan/apps/ocr/south_migrations/0001_initial.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/ocr/south_migrations/0002_auto__del_field_documentqueue_state__del_field_queuedocument_delay__de.py b/mayan/apps/ocr/south_migrations/0002_auto__del_field_documentqueue_state__del_field_queuedocument_delay__de.py
index 7f0b9286b9..be30756d74 100644
--- a/mayan/apps/ocr/south_migrations/0002_auto__del_field_documentqueue_state__del_field_queuedocument_delay__de.py
+++ b/mayan/apps/ocr/south_migrations/0002_auto__del_field_documentqueue_state__del_field_queuedocument_delay__de.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/ocr/south_migrations/0003_auto__chg_field_queuedocument_node_name__chg_field_queuedocument_datet.py b/mayan/apps/ocr/south_migrations/0003_auto__chg_field_queuedocument_node_name__chg_field_queuedocument_datet.py
index dabda93f6a..efc94fefc1 100644
--- a/mayan/apps/ocr/south_migrations/0003_auto__chg_field_queuedocument_node_name__chg_field_queuedocument_datet.py
+++ b/mayan/apps/ocr/south_migrations/0003_auto__chg_field_queuedocument_node_name__chg_field_queuedocument_datet.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/ocr/south_migrations/0004_auto__del_documentqueue__del_queuedocument__add_documentversionocrerro.py b/mayan/apps/ocr/south_migrations/0004_auto__del_documentqueue__del_queuedocument__add_documentversionocrerro.py
index 72b292ff23..661fe0fb72 100644
--- a/mayan/apps/ocr/south_migrations/0004_auto__del_documentqueue__del_queuedocument__add_documentversionocrerro.py
+++ b/mayan/apps/ocr/south_migrations/0004_auto__del_documentqueue__del_queuedocument__add_documentversionocrerro.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/permissions/south_migrations/0001_initial.py b/mayan/apps/permissions/south_migrations/0001_initial.py
index 35738e0009..36777afead 100644
--- a/mayan/apps/permissions/south_migrations/0001_initial.py
+++ b/mayan/apps/permissions/south_migrations/0001_initial.py
@@ -1,7 +1,6 @@
 # encoding: utf-8
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/permissions/south_migrations/0002_auto__add_storedpermission__add_unique_storedpermission_namespace_name.py b/mayan/apps/permissions/south_migrations/0002_auto__add_storedpermission__add_unique_storedpermission_namespace_name.py
index 27c3fbbf36..86be5c6b7f 100644
--- a/mayan/apps/permissions/south_migrations/0002_auto__add_storedpermission__add_unique_storedpermission_namespace_name.py
+++ b/mayan/apps/permissions/south_migrations/0002_auto__add_storedpermission__add_unique_storedpermission_namespace_name.py
@@ -1,7 +1,6 @@
 # encoding: utf-8
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/permissions/south_migrations/0003_clear_permission_holders.py b/mayan/apps/permissions/south_migrations/0003_clear_permission_holders.py
index acca01ce5d..3ddd883f34 100644
--- a/mayan/apps/permissions/south_migrations/0003_clear_permission_holders.py
+++ b/mayan/apps/permissions/south_migrations/0003_clear_permission_holders.py
@@ -1,7 +1,5 @@
 # encoding: utf-8
-from south.db import db
 from south.v2 import DataMigration
-from django.db import models
 
 
 class Migration(DataMigration):
diff --git a/mayan/apps/permissions/south_migrations/0004_auto__del_permission__del_unique_permission_namespace_name.py b/mayan/apps/permissions/south_migrations/0004_auto__del_permission__del_unique_permission_namespace_name.py
index 46199f109f..4281311c18 100644
--- a/mayan/apps/permissions/south_migrations/0004_auto__del_permission__del_unique_permission_namespace_name.py
+++ b/mayan/apps/permissions/south_migrations/0004_auto__del_permission__del_unique_permission_namespace_name.py
@@ -1,7 +1,6 @@
 # encoding: utf-8
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/project_setup/models.py b/mayan/apps/project_setup/models.py
index 71a8362390..8f1065d8f9 100644
--- a/mayan/apps/project_setup/models.py
+++ b/mayan/apps/project_setup/models.py
@@ -1,3 +1 @@
-from django.db import models
-
-# Create your models here.
+from django.db import models  # NOQA
diff --git a/mayan/apps/project_tools/models.py b/mayan/apps/project_tools/models.py
index 71a8362390..8f1065d8f9 100644
--- a/mayan/apps/project_tools/models.py
+++ b/mayan/apps/project_tools/models.py
@@ -1,3 +1 @@
-from django.db import models
-
-# Create your models here.
+from django.db import models  # NOQA
diff --git a/mayan/apps/rest_api/models.py b/mayan/apps/rest_api/models.py
index 71a8362390..8f1065d8f9 100644
--- a/mayan/apps/rest_api/models.py
+++ b/mayan/apps/rest_api/models.py
@@ -1,3 +1 @@
-from django.db import models
-
-# Create your models here.
+from django.db import models  # NOQA
diff --git a/mayan/apps/smart_settings/models.py b/mayan/apps/smart_settings/models.py
index 71a8362390..8f1065d8f9 100644
--- a/mayan/apps/smart_settings/models.py
+++ b/mayan/apps/smart_settings/models.py
@@ -1,3 +1 @@
-from django.db import models
-
-# Create your models here.
+from django.db import models  # NOQA
diff --git a/mayan/apps/sources/api_views.py b/mayan/apps/sources/api_views.py
index 6348ce0d5a..62fa794d17 100644
--- a/mayan/apps/sources/api_views.py
+++ b/mayan/apps/sources/api_views.py
@@ -3,22 +3,20 @@ from __future__ import unicode_literals
 from django.shortcuts import get_object_or_404
 
 from converter.exceptions import UnkownConvertError, UnknownFileFormat
-from converter.literals import (DEFAULT_PAGE_NUMBER,
-                                DEFAULT_ROTATION, DEFAULT_ZOOM_LEVEL)
+from converter.literals import (
+    DEFAULT_PAGE_NUMBER, DEFAULT_ROTATION, DEFAULT_ZOOM_LEVEL
+)
 from rest_framework import generics
 from rest_framework.response import Response
 
-from documents.permissions import PERMISSION_DOCUMENT_CREATE
 from documents.settings import (
     DISPLAY_SIZE, ZOOM_MAX_LEVEL, ZOOM_MIN_LEVEL
 )
-from rest_api.permissions import MayanPermission
 
-from .models import StagingFolderSource, WatchFolderSource
+from .models import StagingFolderSource
 from .serializers import (
-    NewDocumentSerializer, StagingFolderFileSerializer,
-    StagingFolderSerializer, StagingSourceFileImageSerializer,
-    WebFormSourceSerializer
+    StagingFolderFileSerializer,
+    StagingFolderSerializer, StagingSourceFileImageSerializer
 )
 
 
diff --git a/mayan/apps/sources/south_migrations/0001_initial.py b/mayan/apps/sources/south_migrations/0001_initial.py
index 68301ec64d..fb8a4ad946 100644
--- a/mayan/apps/sources/south_migrations/0001_initial.py
+++ b/mayan/apps/sources/south_migrations/0001_initial.py
@@ -1,7 +1,6 @@
 # encoding: utf-8
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/sources/south_migrations/0002_preview_width_required.py b/mayan/apps/sources/south_migrations/0002_preview_width_required.py
index 22b4bf2a26..5658e28706 100644
--- a/mayan/apps/sources/south_migrations/0002_preview_width_required.py
+++ b/mayan/apps/sources/south_migrations/0002_preview_width_required.py
@@ -1,7 +1,6 @@
 # encoding: utf-8
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/sources/south_migrations/0003_auto__del_field_stagingfolder_icon__del_field_webform_icon.py b/mayan/apps/sources/south_migrations/0003_auto__del_field_stagingfolder_icon__del_field_webform_icon.py
index 426bf9f851..7f957fccc2 100644
--- a/mayan/apps/sources/south_migrations/0003_auto__del_field_stagingfolder_icon__del_field_webform_icon.py
+++ b/mayan/apps/sources/south_migrations/0003_auto__del_field_stagingfolder_icon__del_field_webform_icon.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/sources/south_migrations/0004_auto__del_stagingfolder__del_webform__del_watchfolder__del_outofproces.py b/mayan/apps/sources/south_migrations/0004_auto__del_stagingfolder__del_webform__del_watchfolder__del_outofproces.py
index 87a239b21b..254b9793e2 100644
--- a/mayan/apps/sources/south_migrations/0004_auto__del_stagingfolder__del_webform__del_watchfolder__del_outofproces.py
+++ b/mayan/apps/sources/south_migrations/0004_auto__del_stagingfolder__del_webform__del_watchfolder__del_outofproces.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/sources/south_migrations/0005_auto__add_imapemail__add_intervalbasemodel__add_pop3email__add_emailba.py b/mayan/apps/sources/south_migrations/0005_auto__add_imapemail__add_intervalbasemodel__add_pop3email__add_emailba.py
index 5ac64256b3..c8098d2285 100644
--- a/mayan/apps/sources/south_migrations/0005_auto__add_imapemail__add_intervalbasemodel__add_pop3email__add_emailba.py
+++ b/mayan/apps/sources/south_migrations/0005_auto__add_imapemail__add_intervalbasemodel__add_pop3email__add_emailba.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/sources/south_migrations/0006_auto__del_field_source_whitelist__del_field_source_blacklist.py b/mayan/apps/sources/south_migrations/0006_auto__del_field_source_whitelist__del_field_source_blacklist.py
index 9c561a731d..56ae1d576a 100644
--- a/mayan/apps/sources/south_migrations/0006_auto__del_field_source_whitelist__del_field_source_blacklist.py
+++ b/mayan/apps/sources/south_migrations/0006_auto__del_field_source_whitelist__del_field_source_blacklist.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/sources/south_migrations/0007_set_doc_type.py b/mayan/apps/sources/south_migrations/0007_set_doc_type.py
index 1ddb7c9b3e..d2bd3a54d7 100644
--- a/mayan/apps/sources/south_migrations/0007_set_doc_type.py
+++ b/mayan/apps/sources/south_migrations/0007_set_doc_type.py
@@ -1,6 +1,5 @@
 # -*- coding: utf-8 -*-
 from south.v2 import DataMigration
-from django.db import models
 
 
 def fake_get_or_create(model, *args, **kwargs):
diff --git a/mayan/apps/sources/south_migrations/0008_auto__chg_field_intervalbasemodel_document_type.py b/mayan/apps/sources/south_migrations/0008_auto__chg_field_intervalbasemodel_document_type.py
index be4389b91a..c071c33efa 100644
--- a/mayan/apps/sources/south_migrations/0008_auto__chg_field_intervalbasemodel_document_type.py
+++ b/mayan/apps/sources/south_migrations/0008_auto__chg_field_intervalbasemodel_document_type.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/sources/south_migrations/0009_auto__del_watchfoldersource__chg_field_intervalbasemodel_document_type.py b/mayan/apps/sources/south_migrations/0009_auto__del_watchfoldersource__chg_field_intervalbasemodel_document_type.py
index 32d5d923d6..cf354bd485 100644
--- a/mayan/apps/sources/south_migrations/0009_auto__del_watchfoldersource__chg_field_intervalbasemodel_document_type.py
+++ b/mayan/apps/sources/south_migrations/0009_auto__del_watchfoldersource__chg_field_intervalbasemodel_document_type.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 def fake_get_or_create(model, *args, **kwargs):
diff --git a/mayan/apps/sources/south_migrations/0010_auto__add_watchfoldersource.py b/mayan/apps/sources/south_migrations/0010_auto__add_watchfoldersource.py
index ef672ac485..0276b222bf 100644
--- a/mayan/apps/sources/south_migrations/0010_auto__add_watchfoldersource.py
+++ b/mayan/apps/sources/south_migrations/0010_auto__add_watchfoldersource.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/sources/south_migrations/0011_auto__del_field_intervalbasemodel_document_type.py b/mayan/apps/sources/south_migrations/0011_auto__del_field_intervalbasemodel_document_type.py
index 97b09129ab..18b8de0c75 100644
--- a/mayan/apps/sources/south_migrations/0011_auto__del_field_intervalbasemodel_document_type.py
+++ b/mayan/apps/sources/south_migrations/0011_auto__del_field_intervalbasemodel_document_type.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/sources/south_migrations/0012_auto__add_field_intervalbasemodel_document_type.py b/mayan/apps/sources/south_migrations/0012_auto__add_field_intervalbasemodel_document_type.py
index bf3769a77b..d437d122b6 100644
--- a/mayan/apps/sources/south_migrations/0012_auto__add_field_intervalbasemodel_document_type.py
+++ b/mayan/apps/sources/south_migrations/0012_auto__add_field_intervalbasemodel_document_type.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/sources/south_migrations/0013_auto__del_field_watchfoldersource_delete_after_upload.py b/mayan/apps/sources/south_migrations/0013_auto__del_field_watchfoldersource_delete_after_upload.py
index 4a42da1738..74b867b8eb 100644
--- a/mayan/apps/sources/south_migrations/0013_auto__del_field_watchfoldersource_delete_after_upload.py
+++ b/mayan/apps/sources/south_migrations/0013_auto__del_field_watchfoldersource_delete_after_upload.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/storage/models.py b/mayan/apps/storage/models.py
index 71a8362390..8f1065d8f9 100644
--- a/mayan/apps/storage/models.py
+++ b/mayan/apps/storage/models.py
@@ -1,3 +1 @@
-from django.db import models
-
-# Create your models here.
+from django.db import models  # NOQA
diff --git a/mayan/apps/tags/south_migrations/0001_initial.py b/mayan/apps/tags/south_migrations/0001_initial.py
index 033a4e5480..ff771e6f35 100644
--- a/mayan/apps/tags/south_migrations/0001_initial.py
+++ b/mayan/apps/tags/south_migrations/0001_initial.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/tags/south_migrations/0003_remove_taggit.py b/mayan/apps/tags/south_migrations/0003_remove_taggit.py
index da9665655f..d3d5f3c064 100644
--- a/mayan/apps/tags/south_migrations/0003_remove_taggit.py
+++ b/mayan/apps/tags/south_migrations/0003_remove_taggit.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
-from south.db import db
 from south.v2 import DataMigration
-from django.db import models, transaction
+from django.db import transaction
 from django.db.utils import ProgrammingError
 
 
diff --git a/mayan/apps/tags/south_migrations/0005_auto__add_unique_tag_label.py b/mayan/apps/tags/south_migrations/0005_auto__add_unique_tag_label.py
index b00980ab17..3e1e7fab34 100644
--- a/mayan/apps/tags/south_migrations/0005_auto__add_unique_tag_label.py
+++ b/mayan/apps/tags/south_migrations/0005_auto__add_unique_tag_label.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/tags/south_migrations/0006_auto__del_tagproperties.py b/mayan/apps/tags/south_migrations/0006_auto__del_tagproperties.py
index 0e96240c77..cca5be6c59 100644
--- a/mayan/apps/tags/south_migrations/0006_auto__del_tagproperties.py
+++ b/mayan/apps/tags/south_migrations/0006_auto__del_tagproperties.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from south.db import db
 from south.v2 import SchemaMigration
-from django.db import models
 
 
 class Migration(SchemaMigration):
diff --git a/mayan/apps/user_management/models.py b/mayan/apps/user_management/models.py
index 148f268626..da022ca4c2 100644
--- a/mayan/apps/user_management/models.py
+++ b/mayan/apps/user_management/models.py
@@ -1,4 +1,4 @@
-from django.db import models
+from django.db import models  # NOQA
 from django.contrib.auth.models import User, Group
 
 from actstream import registry