Get rid of ui_cocoa_third_party_toolkits target from ui.gyp

tools/licenses.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.
 
 """Utility for checking and processing licensing information in third_party
 directories.
 
 Usage: licenses.py <command>
 
@@ skipping 122 matching lines @@
         "URL": "http://code.google.com/p/angleproject/",
         "License": "BSD",
     },
     os.path.join('third_party', 'cros_system_api'): {
         "Name": "Chromium OS system API",
         "URL": "http://www.chromium.org/chromium-os",
         "License": "BSD",
         # Absolute path here is resolved as relative to the source root.
         "License File": "/LICENSE.chromium_os",
     },
-    os.path.join('third_party', 'GTM'): {
-        "Name": "Google Toolbox for Mac",
-        "URL": "http://code.google.com/p/google-toolbox-for-mac/",
-        "License": "Apache 2.0",
-        "License File": "COPYING",
-    },
     os.path.join('third_party', 'lss'): {
         "Name": "linux-syscall-support",
         "URL": "http://code.google.com/p/linux-syscall-support/",
         "License": "BSD",
         "License File": "/LICENSE",
     },
     os.path.join('third_party', 'ots'): {
         "Name": "OTS (OpenType Sanitizer)",
         "URL": "http://code.google.com/p/ots/",
         "License": "BSD",
@@ skipping 302 matching lines @@
     elif command == 'credits':
         if not GenerateCredits():
             return 1
     else:
         print __doc__
         return 1
 
 
 if __name__ == '__main__':
   sys.exit(main())