Remove a bunch of cruft from //build.

build/env_dump.py

Index: build/env_dump.py
diff --git a/build/env_dump.py b/build/env_dump.py
deleted file mode 100755
index 21edfe633c718ed8f96bd091731fa305da654821..0000000000000000000000000000000000000000
--- a/build/env_dump.py
+++ /dev/null
@@ -1,56 +0,0 @@
-#!/usr/bin/python
-# Copyright 2013 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.
-
-# This script can either source a file and dump the enironment changes done by
-# it, or just simply dump the current environment as JSON into a file.
-
-import json
-import optparse
-import os
-import pipes
-import subprocess
-import sys
-
-
-def main():
-  parser = optparse.OptionParser()
-  parser.add_option('-f', '--output-json',
-                    help='File to dump the environment as JSON into.')
-  parser.add_option(
-      '-d', '--dump-mode', action='store_true',
-      help='Dump the environment to sys.stdout and exit immediately.')
-
-  parser.disable_interspersed_args()
-  options, args = parser.parse_args()
-  if options.dump_mode:
-    if args or options.output_json:
-      parser.error('Cannot specify args or --output-json with --dump-mode.')
-    json.dump(dict(os.environ), sys.stdout)
-  else:
-    if not options.output_json:
-      parser.error('Requires --output-json option.')
-
-    envsetup_cmd = ' '.join(map(pipes.quote, args))
-    full_cmd = [
-        'bash', '-c',
-        '. %s > /dev/null; %s -d' % (envsetup_cmd, os.path.abspath(__file__))
-    ]
-    try:
-      output = subprocess.check_output(full_cmd)
-    except Exception as e:
-      sys.exit('Error running %s and dumping environment.' % envsetup_cmd)
-
-    env_diff = {}
-    new_env = json.loads(output)
-    for k, val in new_env.items():
-      if k == '_' or (k in os.environ and os.environ[k] == val):
-        continue
-      env_diff[k] = val
-    with open(options.output_json, 'w') as f:
-      json.dump(env_diff, f)
-
-
-if __name__ == '__main__':
-  sys.exit(main())