fix: Remove unused variables.

abawchen · abawchen · commit b87a1c3c6b9d · 2018-02-06T15:30:58.000+08:00
diff --git a/graphene_mongo/registry.py b/graphene_mongo/registry.py
@@ -2,7 +2,6 @@ class Registry(object):
 
     def __init__(self):
         self._registry = {}
-        self._registry_models = {}
 
     def register(self, cls):
         from .types import MongoengineObjectType
