diff --git a/mayan/apps/acls/managers.py b/mayan/apps/acls/managers.py
index 1fcc3188a8..5c6f9e5365 100644
--- a/mayan/apps/acls/managers.py
+++ b/mayan/apps/acls/managers.py
@@ -1,17 +1,12 @@
-from __future__ import absolute_import, unicode_literals
+from __future__ import unicode_literals
 
 import logging
 
-from django.contrib.auth.models import User
 from django.contrib.contenttypes.models import ContentType
 from django.core.exceptions import PermissionDenied
-from django.core.urlresolvers import reverse
 from django.db import models
-from django.db.models import Q
 from django.utils.translation import ugettext
 
-from permissions import Permission
-
 logger = logging.getLogger(__name__)
 
 
@@ -38,7 +33,7 @@ class AccessControlListManager(models.Manager):
         if not self.filter(content_type=ContentType.objects.get_for_model(obj), object_id=obj.pk, permissions__in=stored_permissions, role__in=user_roles):
             raise PermissionDenied(ugettext('Insufficient access.'))
 
-    def filter_by_access(self, permission, user, queryset,  exception_on_empty=False, related=None):
+    def filter_by_access(self, permission, user, queryset, exception_on_empty=False, related=None):
         if user.is_superuser or user.is_staff:
             return queryset
 
diff --git a/mayan/apps/common/models.py b/mayan/apps/common/models.py
index fb605aca93..2d3df7a41e 100644
--- a/mayan/apps/common/models.py
+++ b/mayan/apps/common/models.py
@@ -5,7 +5,7 @@ from pytz import common_timezones
 from django.conf import settings
 from django.db import models
 from django.utils.encoding import python_2_unicode_compatible
-from django.utils.translation import ugettext_lazy as _, ugettext
+from django.utils.translation import ugettext_lazy as _
 
 from .runtime import shared_storage_backend
 
diff --git a/mayan/apps/document_indexing/views.py b/mayan/apps/document_indexing/views.py
index d68a15905a..19d2c57474 100644
--- a/mayan/apps/document_indexing/views.py
+++ b/mayan/apps/document_indexing/views.py
@@ -63,7 +63,7 @@ def index_setup_create(request):
     if request.method == 'POST':
         form = IndexForm(request.POST)
         if form.is_valid():
-            index = form.save()
+            form.save()
             messages.success(request, _('Index created successfully.'))
             return HttpResponseRedirect(reverse('indexing:index_setup_list'))
     else:
diff --git a/mayan/apps/dynamic_search/classes.py b/mayan/apps/dynamic_search/classes.py
index e20c97fb04..e6c62fb61b 100644
--- a/mayan/apps/dynamic_search/classes.py
+++ b/mayan/apps/dynamic_search/classes.py
@@ -167,7 +167,6 @@ class SearchModel(object):
 
         elapsed_time = unicode(datetime.datetime.now() - start_time).split(':')[2]
 
-        #queryset = self.model.objects.in_bulk(list(result_set)[:setting_limit.value]).values()
         queryset = self.model.objects.filter(pk__in=list(result_set)[:setting_limit.value])
 
         if self.permission:
diff --git a/mayan/apps/linking/apps.py b/mayan/apps/linking/apps.py
index 3791a81b59..926f9035db 100644
--- a/mayan/apps/linking/apps.py
+++ b/mayan/apps/linking/apps.py
@@ -10,7 +10,6 @@ from common import (
     menu_sidebar
 )
 from documents.models import Document
-from navigation import CombinedSource
 
 from .links import (
     link_smart_link_create, link_smart_link_condition_create,
diff --git a/mayan/apps/tags/views.py b/mayan/apps/tags/views.py
index e509045f11..8bb47cb0ae 100644
--- a/mayan/apps/tags/views.py
+++ b/mayan/apps/tags/views.py
@@ -11,6 +11,7 @@ from django.shortcuts import get_object_or_404, render_to_response
 from django.template import RequestContext
 from django.utils.translation import ugettext_lazy as _, ungettext
 
+from acls.models import AccessControlList
 from documents.models import Document
 from documents.views import DocumentListView
 from documents.permissions import permission_document_view
@@ -33,7 +34,7 @@ def tag_create(request):
     if request.method == 'POST':
         form = TagForm(request.POST)
         if form.is_valid():
-            tag = form.save()
+            form.save()
 
             messages.success(request, _('Tag created succesfully.'))
             return HttpResponseRedirect(redirect_url)