[DEPS] Remove cleanup_links pre_deps_hooks

`cleanup_links` pre_deps_hooks should be deleted
in March 2017. Now many years have passed since
2017, this CL will delete this pre_deps_hooks.

Bug:None
Change-Id: I9750d38056bb67966853d1cd1ce223a8ae63a73d
Reviewed-on: https://chromium-review.googlesource.com/c/libyuv/libyuv/+/5435873
Reviewed-by: Frank Barchard <fbarchard@chromium.org>
Commit-Queue: Frank Barchard <fbarchard@chromium.org>

AUTHORS

@@ -3,4 +3,5 @@
 
 Google Inc.
 
+Ho Cheung <uioptt24@gmail.com>
 Ivan Pavlotskiy <ivan.pavlotskiy@lgepartner.com>

DEPS

@@ -2315,16 +2315,6 @@ deps = {
   # === ANDROID_DEPS Generated Code End ===
 }
 
-pre_deps_hooks = [
-  {
-    # Remove any symlinks from before 177567c518b121731e507e9b9c4049c4dc96e4c8.
-    # TODO(kjellander): Remove this in March 2017.
-    'name': 'cleanup_links',
-    'pattern': '.',
-    'action': ['python3', 'src/cleanup_links.py'],
-  },
-]
-
 hooks = [
   {
     # This clobbers when necessary (based on get_landmines.py). It should be

cleanup_links.py

@@ -1,108 +0,0 @@
-#!/usr/bin/env vpython3
-
-# Copyright 2017 The LibYuv Project Authors. All rights reserved.
-#
-# Use of this source code is governed by a BSD-style license
-# that can be found in the LICENSE file in the root of the source
-# tree. An additional intellectual property rights grant can be found
-# in the file PATENTS. All contributing project authors may
-# be found in the AUTHORS file in the root of the source tree.
-
-# This is a copy of the file from WebRTC in:
-# https://chromium.googlesource.com/external/webrtc/+/master/cleanup_links.py
-
-"""Script to cleanup symlinks created from setup_links.py.
-
-Before 177567c518b121731e507e9b9c4049c4dc96e4c8 (#15754) we had a Chromium
-checkout which we created symlinks into. In order to do clean syncs after
-landing that change, this script cleans up any old symlinks, avoiding annoying
-manual cleanup needed in order to complete gclient sync.
-"""
-
-import argparse
-import logging
-import os
-import shelve
-import subprocess
-import sys
-
-
-ROOT_DIR = os.path.dirname(os.path.abspath(__file__))
-LINKS_DB = 'links'
-
-# Version management to make future upgrades/downgrades easier to support.
-SCHEMA_VERSION = 1
-
-class WebRTCLinkSetup():
-  def __init__(self, links_db, dry_run=False):
-    self._dry_run = dry_run
-    self._links_db = links_db
-
-  def CleanupLinks(self):
-    logging.debug('CleanupLinks')
-    for source, link_path  in self._links_db.tems():
-      if source == 'SCHEMA_VERSION':
-        continue
-      if os.path.islink(link_path) or sys.platform.startswith('win'):
-        # os.path.islink() always returns false on Windows
-        # See http://bugs.python.org/issue13143.
-        logging.debug('Removing link to %s at %s', source, link_path)
-        if not self._dry_run:
-          if os.path.exists(link_path):
-            if sys.platform.startswith('win') and os.path.isdir(link_path):
-              subprocess.check_call(['rmdir', '/q', '/s', link_path],
-                                    shell=True)
-            else:
-              os.remove(link_path)
-          del self._links_db[source]
-
-
-def _initialize_database(filename):
-  links_database = shelve.open(filename)
-  # Wipe the database if this version of the script ends up looking at a
-  # newer (future) version of the links db, just to be sure.
-  version = links_database.get('SCHEMA_VERSION')
-  if version and version != SCHEMA_VERSION:
-    logging.info('Found database with schema version %s while this script only '
-                 'supports %s. Wiping previous database contents.', version,
-                 SCHEMA_VERSION)
-    links_database.clear()
-  links_database['SCHEMA_VERSION'] = SCHEMA_VERSION
-  return links_database
-
-
-def main():
-  p = argparse.ArgumentParser()
-  p.add_argument('-d', '--dry-run', action='store_true', default=False,
-                 help='Print what would be done, but don\'t perform any '
-                      'operations. This will automatically set logging to '
-                      'verbose.')
-  p.add_argument('-v', '--verbose', action='store_const',
-                 const=logging.DEBUG, default=logging.INFO,
-                 help='Print verbose output for debugging.')
-  options = p.parse_args()
-
-  if options.dry_run:
-    options.verbose = logging.DEBUG
-  logging.basicConfig(format='%(message)s', level=options.verbose)
-
-  # Work from the root directory of the checkout.
-  script_dir = os.path.dirname(os.path.abspath(__file__))
-  os.chdir(script_dir)
-
-  # The database file gets .db appended on some platforms.
-  db_filenames = [LINKS_DB, LINKS_DB + '.db']
-  if any(os.path.isfile(f) for f in db_filenames):
-    links_database = _initialize_database(LINKS_DB)
-    try:
-      symlink_creator = WebRTCLinkSetup(links_database, options.dry_run)
-      symlink_creator.CleanupLinks()
-    finally:
-      for f in db_filenames:
-        if os.path.isfile(f):
-          os.remove(f)
-  return 0
-
-
-if __name__ == '__main__':
-  sys.exit(main())