Removed some test settings following removal of compatibility checks.

tests/admin_scripts/tests.py

@@ -60,8 +60,6 @@ class AdminScriptTestCase(unittest.TestCase):
                 'DATABASES',
                 'ROOT_URLCONF',
                 'SECRET_KEY',
-                'TEST_RUNNER',  # We need to include TEST_RUNNER, otherwise we get a compatibility warning.
-                'MIDDLEWARE_CLASSES',  # We need to include MIDDLEWARE_CLASSES, otherwise we get a compatibility warning.
             ]
             for s in exports:
                 if hasattr(settings, s):