Revert of Turn on hermetic toolchain for all corp machines.

build/mac/should_use_hermetic_xcode.py

Index: build/mac/should_use_hermetic_xcode.py
diff --git a/build/mac/should_use_hermetic_xcode.py b/build/mac/should_use_hermetic_xcode.py
deleted file mode 100755
index 14ddfacdc5020b780334eb838ebe9bfddbd06314..0000000000000000000000000000000000000000
--- a/build/mac/should_use_hermetic_xcode.py
+++ /dev/null
@@ -1,26 +0,0 @@
-#!/usr/bin/env python
-# Copyright 2016 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.
-
-"""Prints "1" if Chrome targets should be built with hermetic xcode. Otherwise
-prints "0"."""
-
-import os
-import sys
-
-
-def _IsCorpMachine():
-  return os.path.isdir('/Library/GoogleCorpSupport/')
-
-
-def main():
-  if os.environ.get('FORCE_MAC_TOOLCHAIN') or _IsCorpMachine():
-    return "1"
-  else:
-    return "0"
-
-
-if __name__ == '__main__':
-  print main()
-  sys.exit(0)