Revert "[1.7.x] Fixed #22331 -- Fixed migrations ProjectState to ignore unmanaged models."

This reverts commit bf69375c4d.

django/db/migrations/state.py

@@ -58,9 +58,8 @@ class ProjectState(object):
         "Takes in an Apps and returns a ProjectState matching it"
         app_models = {}
         for model in apps.get_models():
-            if model._meta.managed:
-                model_state = ModelState.from_model(model)
-                app_models[(model_state.app_label, model_state.name.lower())] = model_state
+            model_state = ModelState.from_model(model)
+            app_models[(model_state.app_label, model_state.name.lower())] = model_state
         return cls(app_models)
 
     def __eq__(self, other):

tests/migrations/test_state.py

@@ -52,22 +52,11 @@ class StateTests(TestCase):
                 verbose_name = "tome"
                 db_table = "test_tome"
 
-        class Unmanaged(models.Model):
-            title = models.CharField(max_length=1000)
-
-            class Meta:
-                app_label = "migrations"
-                apps = new_apps
-                managed = False
-
         project_state = ProjectState.from_apps(new_apps)
         author_state = project_state.models['migrations', 'author']
         author_proxy_state = project_state.models['migrations', 'authorproxy']
         sub_author_state = project_state.models['migrations', 'subauthor']
         book_state = project_state.models['migrations', 'book']
-        # unmanaged models should not appear in migrations
-        with self.assertRaises(KeyError):
-            project_state.models['migrations', 'unmanaged']
 
         self.assertEqual(author_state.app_label, "migrations")
         self.assertEqual(author_state.name, "Author")