Remove unused imports in release script (usage masked by compatibilty technique).

--HG--
extra : rebase_source : 4f9aabd0efe87de76f85f91c4c379e48f68ffac4

release.py

@@ -5,14 +5,8 @@ install jaraco.packaging and run 'python -m jaraco.packaging.release'
 
 import re
 import os
-import itertools
 import subprocess
 
-try:
-    zip_longest = itertools.zip_longest
-except AttributeError:
-    zip_longest = itertools.izip_longest
-
 
 def before_upload():
     _linkify('CHANGES.txt', 'CHANGES (links).txt')