diff --git a/reviewboard/admin/__init__.py b/reviewboard/admin/__init__.py
index 28f8790733ba5a770896773a2ad98c0e70172cb2..6c10cb94e10293006864e3dc1c38feb78cbe89ce 100644
--- a/reviewboard/admin/__init__.py
+++ b/reviewboard/admin/__init__.py
@@ -42,11 +42,7 @@ def _on_initializing(*args, **kwargs):
 admin_site = SimpleLazyObject(_get_admin_site)
 
 
-default_app_config = 'reviewboard.admin.apps.AdminAppConfig'
-
-
 __all__ = [
     'ModelAdmin',
     'admin_site',
-    'default_app_config',
 ]
diff --git a/reviewboard/oauth/__init__.py b/reviewboard/oauth/__init__.py
index 4625cc0f7d27c24dff351e1807b8d0d422c832ff..398372e8c079e836ed97b53f44984b53b8eb883b 100644
--- a/reviewboard/oauth/__init__.py
+++ b/reviewboard/oauth/__init__.py
@@ -8,9 +8,6 @@ from django.dispatch import receiver
 from reviewboard.signals import initializing
 
 
-default_app_config = 'reviewboard.oauth.apps.OAuthAppConfig'
-
-
 @receiver(initializing)
 def _on_initializing(**kwargs):
     """Enable OAuth scopes for the API when initializing Review Board.