Removed unnecessary list() call in ModelBase.__new__().
Unnecessary since
@@ -91,7 +91,7 @@ class ModelBase(type):
# method to type.__new__() so that they're properly initialized
# (i.e. __set_name__()).
contributable_attrs = {}
- for obj_name, obj in list(attrs.items()):
+ for obj_name, obj in attrs.items():
if _has_contribute_to_class(obj):
contributable_attrs[obj_name] = obj
else:
