diff --git a/mayan/apps/converter/backends/python.py b/mayan/apps/converter/backends/python.py
index a82cb08ac7..326daac750 100644
--- a/mayan/apps/converter/backends/python.py
+++ b/mayan/apps/converter/backends/python.py
@@ -15,14 +15,8 @@ from PIL import Image
 import sh
 
 from common.utils import fs_cleanup
-from mimetype.api import get_mimetype
 
 from ..classes import ConverterBase
-from ..exceptions import ConvertError, UnknownFileFormat
-from ..literals import (
-    DEFAULT_FILE_FORMAT, DEFAULT_PAGE_NUMBER, TRANSFORMATION_RESIZE,
-    TRANSFORMATION_ROTATE, TRANSFORMATION_ZOOM
-)
 from ..settings import PDFTOPPM_PATH
 
 try:
@@ -92,6 +86,3 @@ class Python(ConverterBase):
             pass
 
         return page_count
-
-
-
diff --git a/mayan/apps/converter/literals.py b/mayan/apps/converter/literals.py
index ca2648e061..69c9c2b3d6 100644
--- a/mayan/apps/converter/literals.py
+++ b/mayan/apps/converter/literals.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 from __future__ import unicode_literals
 
 from django.utils.translation import ugettext_lazy as _
@@ -10,41 +9,3 @@ DEFAULT_FILE_FORMAT = 'jpeg'
 DEFAULT_FILE_FORMAT_MIMETYPE = 'image/jpeg'
 
 DIMENSION_SEPARATOR = 'x'
-
-TRANSFORMATION_RESIZE = 'resize'
-TRANSFORMATION_ROTATE = 'rotate'
-TRANSFORMATION_DENSITY = 'density'
-TRANSFORMATION_ZOOM = 'zoom'
-
-TRANSFORMATION_CHOICES = {
-    TRANSFORMATION_RESIZE: {
-        'label': _('Resize'),
-        'description': _('Resize.'),
-        'arguments': [
-            {'name': 'width', 'label': _('Width'), 'required': True},
-            {'name': 'height', 'label': _('Height'), 'required': False},
-        ]
-    },
-    TRANSFORMATION_ROTATE: {
-        'label': _('Rotate'),
-        'description': _('Rotate by n degress.'),
-        'arguments': [
-            {'name': 'degrees', 'label': _('Degrees'), 'required': True}
-        ]
-    },
-    TRANSFORMATION_DENSITY: {
-        'label': _('Density'),
-        'description': _('Change the resolution (ie: DPI) without resizing.'),
-        'arguments': [
-            {'name': 'width', 'label': _('Width'), 'required': True},
-            {'name': 'height', 'label': _('Height'), 'required': False},
-        ]
-    },
-    TRANSFORMATION_ZOOM: {
-        'label': _('Zoom'),
-        'description': _('Zoom by n percent.'),
-        'arguments': [
-            {'name': 'percent', 'label': _('Percent'), 'required': True}
-        ]
-    },
-}
diff --git a/mayan/apps/document_states/views.py b/mayan/apps/document_states/views.py
index 87858f26dd..8b0ecd399c 100644
--- a/mayan/apps/document_states/views.py
+++ b/mayan/apps/document_states/views.py
@@ -200,7 +200,7 @@ class SetupWorkflowDocumentTypesView(AssignRemoveView):
         try:
             Permission.objects.check_permissions(self.request.user, [PERMISSION_WORKFLOW_EDIT])
         except PermissionDenied:
-            AccessEntry.objects.check_access(PERMISSION_WORKFLOW_EDIT, self.request.user,self.workflow)
+            AccessEntry.objects.check_access(PERMISSION_WORKFLOW_EDIT, self.request.user, self.workflow)
 
         return super(SetupWorkflowDocumentTypesView, self).dispatch(request, *args, **kwargs)
 
diff --git a/mayan/apps/metadata/apps.py b/mayan/apps/metadata/apps.py
index e6a81b6ab8..d16370e700 100644
--- a/mayan/apps/metadata/apps.py
+++ b/mayan/apps/metadata/apps.py
@@ -33,7 +33,7 @@ from .links import (
     link_setup_metadata_type_delete, link_setup_metadata_type_edit,
     link_setup_metadata_type_list, link_documents_missing_required_metadata
 )
-from .models import DocumentMetadata, DocumentTypeMetadataType, MetadataType
+from .models import DocumentTypeMetadataType, MetadataType
 from .permissions import (
     PERMISSION_METADATA_DOCUMENT_ADD, PERMISSION_METADATA_DOCUMENT_EDIT,
     PERMISSION_METADATA_DOCUMENT_REMOVE, PERMISSION_METADATA_DOCUMENT_VIEW
diff --git a/mayan/apps/metadata/views.py b/mayan/apps/metadata/views.py
index 05dcc906a6..5d5626c588 100644
--- a/mayan/apps/metadata/views.py
+++ b/mayan/apps/metadata/views.py
@@ -13,7 +13,7 @@ from django.utils.translation import ugettext_lazy as _, ungettext
 from acls.models import AccessEntry
 from documents.models import Document, DocumentType
 from documents.permissions import (
-    PERMISSION_DOCUMENT_TYPE_EDIT, PERMISSION_DOCUMENT_VIEW
+    PERMISSION_DOCUMENT_TYPE_EDIT
 )
 from documents.views import DocumentListView
 from permissions.models import Permission
@@ -163,7 +163,7 @@ def metadata_add(request, document_id=None, document_id_list=None):
 
     if not documents:
         messages.error(request, _('Must provide at least one document.'))
-        return HttpResponseRedirect(request.META.get('HTTP_REFERER', reversesettings.LOGIN_REDIRECT_URL))
+        return HttpResponseRedirect(request.META.get('HTTP_REFERER', reverse(settings.LOGIN_REDIRECT_URL)))
 
     for document in documents:
         document.add_as_recent_document_for_user(request.user)