Removed test that's causing issues on Travis

wagtail/wagtailcore/tests/test_page_model.py

@@ -677,26 +677,3 @@ class TestIssue756(TestCase):
 
         # Check that latest_revision_created_at is still set
         self.assertIsNotNone(Page.objects.get(id=1).latest_revision_created_at)
-
-
-class TestPageProxy(TestCase):
-    def test_page_proxy(self):
-        from django.apps import apps
-        wagtailcore_models = apps.all_models['wagtailcore'].copy()
-
-        try:
-            # See #1265
-            # Proxy models can sometimes return None from their _meta.get_fields method
-            # This caused the check method to break as it didn't expect this
-            class PageProxy(Page):
-                class Meta:
-                    proxy = True
-                    app_label = 'wagtailcore'
-
-            # Shouldn't raise an error
-            PageProxy.check()
-        finally:
-            # Django registers models as they're initialised
-            # Unregister PageProxy to prevent breaking the migrations test
-            apps.all_models['wagtailcore'] = wagtailcore_models
-            apps.clear_cache()