diff --git a/moto/awslambda/models.py b/moto/awslambda/models.py
index 32718714..0e24330c 100644
--- a/moto/awslambda/models.py
+++ b/moto/awslambda/models.py
@@ -1,6 +1,5 @@
 from __future__ import unicode_literals
 
-import StringIO
 import base64
 import datetime
 import hashlib