Closes #17725: Clean up import statements (#17728)

* #17725: Resolve all F401 errors

* Tweak noqa designation

netbox/users/apps.py

@@ -6,7 +6,7 @@ class UsersConfig(AppConfig):
 
     def ready(self):
         from netbox.models.features import register_models
-        from . import signals
+        from . import signals  # noqa: F401
 
         # Register models
         register_models(*self.get_models())

netbox/users/tests/test_views.py

@@ -1,8 +1,6 @@
-from django.test import override_settings
-
 from core.models import ObjectType
 from users.models import *
-from utilities.testing import ViewTestCases, create_test_user, extract_form_failures
+from utilities.testing import ViewTestCases, create_test_user
 
 
 class UserTestCase(