remove unused import (pythonGH-5040) (python#5042)

miss-islington · benjaminp · commit 1b2812a7b497 · 2017-12-28T23:48:10.000-08:00
(cherry picked from commit e325608)
diff --git a/Lib/lib2to3/patcomp.py b/Lib/lib2to3/patcomp.py
@@ -12,7 +12,6 @@
 
 # Python imports
 import io
-import os
 
 # Fairly local imports
 from .pgen2 import driver, literals, token, tokenize, parse, grammar
