[2.7] remove unused import (GH-5040). (#5043)

benjaminp · web-flow · commit 1f9d549a3bba · 2017-12-28T23:38:55.000-08:00
(cherry picked from commit e325608)
diff --git a/Lib/lib2to3/patcomp.py b/Lib/lib2to3/patcomp.py
@@ -11,7 +11,6 @@
 __author__ = "Guido van Rossum <guido@python.org>"
 
 # Python imports
-import os
 import StringIO
 
 # Fairly local imports
