diff --git a/docs/conf.py b/docs/conf.py
index <HASH>..<HASH> 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -16,7 +16,6 @@
 # documentation root, use os.path.abspath to make it absolute, like shown here.
 import os
 import sys
-import sys
 
 try:
     from mock import Mock as MagicMock
remove duplicated import in docs conf.py