[2.2.x] Removed unused imports.

tests/many_to_many/tests.py

@@ -1,7 +1,5 @@
-from unittest import mock
-
 from django.db import transaction
-from django.test import TestCase, skipUnlessDBFeature
+from django.test import TestCase
 
 from .models import Article, InheritedArticleA, InheritedArticleB, Publication
 

tests/view_tests/tests/test_debug.py

@@ -21,8 +21,7 @@ from django.utils.safestring import mark_safe
 from django.utils.version import PY36
 from django.views.debug import (
     CLEANSED_SUBSTITUTE, CallableSettingWrapper, ExceptionReporter,
-    Path as DebugPath, cleanse_setting, default_urlconf,
-    technical_404_response, technical_500_response,
+    Path as DebugPath, cleanse_setting, technical_500_response,
 )
 
 from ..views import (