Do not auto-update git-cl anymore.

The major use case was for ChromiumOS devs who were using repo. It's not a
frequent use case anymore. Having git-cl sync on each invocation is costly.

TBR=nsylvain@chromium.org
BUG=
TEST=


Review URL: http://codereview.chromium.org/9389030

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@121834 0039d316-1c4b-4281-b951-d872f2087c98

git-cl

@@ -1,5 +1,5 @@
 #!/bin/sh
-# Copyright (c) 2011 The Chromium Authors. All rights reserved.
+# 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.
 
@@ -8,7 +8,8 @@
 
 base_dir=$(dirname "$0")
 
-"$base_dir"/update_depot_tools
+# Uncomment this line if you never use gclient.
+# "$base_dir"/update_depot_tools
 
 # Test if this script is running under a MSys install.  If it is, we will
 # hardcode the path to Python where possible.