Fix flake8 error

td/tests/commenting/test_models.py

@@ -15,7 +15,7 @@ def setUp(self):
         content_type = ContentType.objects.get_for_model(self.language)
         self.comment = CommentTag.objects.create(name=self.language.tag_slug, slug=self.language.tag_slug,
                                                  object_id=self.language.id, content_type=content_type)
-    
+
     def tearDown(self):
         super(CommentTagTestCase, self).tearDown()
 

td/utils.py

@@ -1,8 +1,6 @@
 import operator
 import types
 
-from datetime import datetime
-
 from django.core.paginator import Paginator
 from django.db.models import Q
 from django.http import JsonResponse