diff --git a/graphql/execution/utils.py b/graphql/execution/utils.py
index 817782a8..4ac3a0d5 100644
--- a/graphql/execution/utils.py
+++ b/graphql/execution/utils.py
@@ -1,6 +1,5 @@
 # -*- coding: utf-8 -*-
 import logging
-from traceback import format_exception
 
 from ..error import GraphQLError
 from ..language import ast