--- a/mercurial/branchmap.py	Mon Mar 13 00:55:14 2017 +0530
+++ b/mercurial/branchmap.py	Sun Mar 12 11:47:02 2017 -0700
@@ -7,7 +7,6 @@
 
 from __future__ import absolute_import
 
-import array
 import struct
 
 from .node import (
@@ -23,7 +22,6 @@
     util,
 )
 
-array = array.array
 calcsize = struct.calcsize
 pack = struct.pack
 unpack = struct.unpack