Remove unused import

Author: richin13

graphene_sqlalchemy/fields.py

@@ -7,8 +7,7 @@
 
 from graphene import NonNull
 from graphene.relay import Connection, ConnectionField
-from graphene.relay.connection import (PageInfo, connection_adapter,
-                                       page_info_adapter)
+from graphene.relay.connection import connection_adapter, page_info_adapter
 from graphql_relay.connection.arrayconnection import \
     connection_from_array_slice