Fix git cl set-commit --clear.

git_cl.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.
 
 # Copyright (C) 2008 Evan Martin <martine@danga.com>
 
 """A git-command for integrating reviews on Rietveld and Gerrit."""
 
 from __future__ import print_function
@@ skipping 4724 matching lines @@
   auth.add_auth_options(parser)
   options, args = parser.parse_args(args)
   auth_config = auth.extract_auth_config_from_options(options)
   if args:
     parser.error('Unrecognized args: %s' % ' '.join(args))
   if options.dry_run and options.clear:
     parser.error('Make up your mind: both --dry-run and --clear not allowed')
 
   cl = Changelist(auth_config=auth_config)
   if options.clear:
-    state = _CQState.CLEAR
+    state = _CQState.NONE
   elif options.dry_run:
     state = _CQState.DRY_RUN
   else:
     state = _CQState.COMMIT
   if not cl.GetIssue():
     parser.error('Must upload the issue first')
   cl._codereview_impl.SetCQState(state)
   return 0
 
 
@@ skipping 347 matching lines @@
 if __name__ == '__main__':
   # These affect sys.stdout so do it outside of main() to simplify mocks in
   # unit testing.
   fix_encoding.fix_encoding()
   setup_color.init()
   try:
     sys.exit(main(sys.argv[1:]))
   except KeyboardInterrupt:
     sys.stderr.write('interrupted\n')
     sys.exit(1)