options.from_logs is not used anywhere since it's the default.

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."""
 
 import json
@@ skipping 1075 matching lines @@
   parser.add_option('-t', dest='title', help='title for patchset')
   parser.add_option('-r', '--reviewers',
                     help='reviewer email addresses')
   parser.add_option('--cc',
                     help='cc email addresses')
   parser.add_option('--send-mail', action='store_true',
                     help='send email to reviewer immediately')
   parser.add_option("--emulate_svn_auto_props", action="store_true",
                     dest="emulate_svn_auto_props",
                     help="Emulate Subversion's auto properties feature.")
-  parser.add_option("--desc_from_logs", action="store_true",
-                    dest="from_logs",
-                    help="""Squashes git commit logs into change description and
-                            uses message as subject""")
   parser.add_option('-c', '--use-commit-queue', action='store_true',
                     help='tell the commit queue to commit this patchset')
   if settings.GetIsGerrit():
     parser.add_option('--target_branch', dest='target_branch', default='master',
                       help='target branch to upload')
   (options, args) = parser.parse_args(args)
 
   # Print warning if the user used the -m/--message argument.  This will soon
   # change to -t/--title.
   if options.message:
@@ skipping 501 matching lines @@
              'and retry or visit go/isgaeup.\n%s') % (e.code, str(e)))
 
   # Not a known command. Default to help.
   GenUsage(parser, 'help')
   return CMDhelp(parser, argv)
 
 
 if __name__ == '__main__':
   fix_encoding.fix_encoding()
   sys.exit(main(sys.argv[1:]))