Clean up database test case imports

Signed-off-by: Aleksi Häkli <aleksi.hakli@iki.fi>

axes/tests/test_models.py

@@ -1,27 +1,28 @@
+from django.apps.registry import apps
+from django.db import connection
+from django.db.migrations.autodetector import MigrationAutodetector
+from django.db.migrations.executor import MigrationExecutor
+from django.db.migrations.state import ProjectState
 from django.test import TestCase
+from django.utils import translation
 
 
 class MigrationsCheck(TestCase):
     def setUp(self):
-        from django.utils import translation
         self.saved_locale = translation.get_language()
         translation.deactivate_all()
 
     def tearDown(self):
         if self.saved_locale is not None:
-            from django.utils import translation
             translation.activate(self.saved_locale)
 
     def test_missing_migrations(self):
-        from django.db import connection
-        from django.apps.registry import apps
-        from django.db.migrations.executor import MigrationExecutor
         executor = MigrationExecutor(connection)
-        from django.db.migrations.autodetector import MigrationAutodetector
-        from django.db.migrations.state import ProjectState
         autodetector = MigrationAutodetector(
             executor.loader.project_state(),
             ProjectState.from_apps(apps),
         )
+
         changes = autodetector.changes(graph=executor.loader.graph)
+
         self.assertEqual({}, changes)