--- a/mercurial/exchange.py	Thu Apr 10 15:12:12 2014 +0800
+++ b/mercurial/exchange.py	Fri Apr 11 17:20:15 2014 -0400
@@ -5,7 +5,6 @@
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2 or any later version.
 
-import sys
 from i18n import _
 from node import hex, nullid
 import cStringIO