Cleanup: Remove the instances of "rm_binaries.py" from 'src/tools/gn/bin'

DEPS

 # This file is automatically processed to create .DEPS.git which is the file
 # that gclient uses under git.
 #
 # See http://code.google.com/p/chromium/wiki/UsingGit
 #
 # To test manually, run:
 #   python tools/deps2git/deps2git.py -o .DEPS.git -w <gclientdir>
 # where <gcliendir> is the absolute path to the directory containing the
 # .gclient file (the parent of 'src').
 #
@@ skipping 652 matching lines @@
     'name': 'gn_linux64',
     'pattern': '.',
     'action': [ 'download_from_google_storage',
                 '--no_resume',
                 '--platform=linux*',
                 '--no_auth',
                 '--bucket', 'chromium-gn',
                 '-s', 'src/buildtools/linux64/gn.sha1',
     ],
   },
-  {
-    # Remove GN binaries from tools/gn/bin that aren't used anymore.
-    # TODO(brettw) remove after the end of July, 2014.
-    'name': 'remove_old_gn_binaries',
-    'pattern': '.',
-    'action': ['python', 'src/tools/gn/bin/rm_binaries.py'],
-  },
   # Pull clang-format binaries using checked-in hashes.
   {
     'name': 'clang_format_win',
     'pattern': '.',
     'action': [ 'download_from_google_storage',
                 '--no_resume',
                 '--platform=win32',
                 '--no_auth',
                 '--bucket', 'chromium-clang-format',
                 '-s', 'src/buildtools/win/clang-format.exe.sha1',
@@ skipping 103 matching lines @@
     # corresponding .py files have already been deleted.
     'name': 'remove_stale_pyc_files',
     'pattern': 'src/tools/.*\\.py',
     'action': [
         'python',
         'src/tools/remove_stale_pyc_files.py',
         'src/tools',
     ],
   },
 ]