--- a/docs/conf.py	Thu Sep 21 17:13:09 2017 +0200
+++ b/docs/conf.py	Thu Sep 21 17:13:46 2017 +0200
@@ -7,7 +7,7 @@
 from mercurial import ui
 from mercurial import extensions as hgext
 from mercurial import commands
-import os, sys
+import os
 
 extensions = ["sphinx.ext.graphviz"]