Delete unused script.

BUG=

Review-Url: https://codereview.chromium.org/2368683002
Cr-Commit-Position: refs/heads/master@{#420746}

build/rmdir_and_stamp.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.
-
-"""Wipes out a directory recursively and then touches a stamp file.
-
-This odd pairing of operations is used to support build scripts which
-slurp up entire directories (e.g. build/android/javac.py when handling
-generated sources) as inputs.
-
-The general pattern of use is:
-
-  - Add a target which generates |gen_sources| into |out_path| from |inputs|.
-  - Include |stamp_file| as an input for that target or any of its rules which
-    generate files in |out_path|.
-  - Add an action which depends on |inputs| and which outputs |stamp_file|;
-    the action should run this script and pass |out_path| and |stamp_file| as
-    its arguments.
-
-The net result is that you will force |out_path| to be wiped and all
-|gen_sources| to be regenerated any time any file in |inputs| changes.
-
-See //mojo/mojom_bindings_generator.gypi for an example use case.
-
-"""
-
-import errno
-import os
-import shutil
-import sys
-
-
-def Main(dst_dir, stamp_file):
-  try:
-    shutil.rmtree(os.path.normpath(dst_dir))
-  except OSError as e:
-    # Ignore only "not found" errors.
-    if e.errno != errno.ENOENT:
-      raise e
-  with open(stamp_file, 'a'):
-    os.utime(stamp_file, None)
-
-if __name__ == '__main__':
-  sys.exit(Main(sys.argv[1], sys.argv[2]))