[1.7.x] Revert "Improved AppRegistryNotReady message."

This reverts commit 154f5f0de108f428de2d5f488e0264f4459a4b66.

Aymeric: "I chose not to talk about django.setup() here on purpose.
This will hardly always be the correct solution."

Backport of 8121860be4 from master

1 files changed, 1 insertions, 1 deletions

diff --git a/django/apps/registry.py b/django/apps/registry.py
index 08c6fc947e..57bdc3edb2 100644
--- a/django/apps/registry.py
+++ b/django/apps/registry.py
@@ -128,7 +128,7 @@ class Apps(object):
         Raises an exception if all models haven't been imported yet.
         """
         if not self.models_ready:
-            raise AppRegistryNotReady("Models aren't loaded yet. Ensure django.setup() has been called.")
+            raise AppRegistryNotReady("Models aren't loaded yet.")
 
     def get_app_configs(self):
         """