remove custom domain for private storage

Author: marcoacierno

backend/pycon/storages.py

@@ -68,6 +68,11 @@ def get_object_parameters(self, name):
         params.pop("CacheControl", None)
         return params
 
+    def get_default_settings(self):
+        settings = super().get_default_settings()
+        settings["custom_domain"] = None
+        return settings
+
 
 class CustomInMemoryStorage(InMemoryStorage):
     is_remote = False