Remove old compatibility for git_cl_upload branches.

tests/git_cl_test.py

 #!/usr/bin/env python
 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Unit tests for git_cl.py."""
 
 import os
 import StringIO
 import stat
@@ skipping 777 matching lines @@
     elif squash_mode in ('override_squash', 'override_nosquash'):
       calls.extend([
         ((['git', 'config', '--bool', 'gerrit.override-squash-uploads'],),
          'true' if squash_mode == 'override_squash' else 'false'),
       ])
     else:
       assert squash_mode in ('squash', 'nosquash')
 
     # If issue is given, then description is fetched from Gerrit instead.
     if issue is None:
-      if squash:
-        calls += [
-          ((['git', 'show', '--format=%B', '-s',
-             'refs/heads/git_cl_uploads/master'],), '')]
       calls += [
           ((['git', 'log', '--pretty=format:%s\n\n%b',
                    'fake_ancestor_sha..HEAD'],),
                   description)]
     if not git_footers.get_footer_change_id(description) and not squash:
       calls += [
           # DownloadGerritHook(False)
           ((False, ),
             ''),
           # Amending of commit message to get the Change-Id.
@@ skipping 883 matching lines @@
         ((['rm_file_or_tree', '/abs/git_repo_root/.git/hooks/commit-msg'],),
          ''),
     ]
     cl._codereview_impl._GerritCommitMsgHookCheck(offer_removal=True)
 
 
 if __name__ == '__main__':
   git_cl.logging.basicConfig(
       level=git_cl.logging.DEBUG if '-v' in sys.argv else git_cl.logging.ERROR)
   unittest.main()