Remove a bunch of cruft from //build.

build/win_is_xtree_patched.py

Index: build/win_is_xtree_patched.py
diff --git a/build/win_is_xtree_patched.py b/build/win_is_xtree_patched.py
deleted file mode 100755
index 3f1994ff9d1749b69e9c26130a60c615bfc80701..0000000000000000000000000000000000000000
--- a/build/win_is_xtree_patched.py
+++ /dev/null
@@ -1,26 +0,0 @@
-#!/usr/bin/env python
-# Copyright 2014 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.
-
-"""Determines if the VS xtree header has been patched to disable C4702."""
-
-import os
-
-
-def IsPatched():
-  # TODO(scottmg): For now, just return if we're using the packaged toolchain
-  # script (because we know it's patched). Another case could be added here to
-  # query the active VS installation and actually check the contents of xtree.
-  # http://crbug.com/346399.
-  return int(os.environ.get('DEPOT_TOOLS_WIN_TOOLCHAIN', 1)) == 1
-
-
-def DoMain(_):
-  """Hook to be called from gyp without starting a separate python
-  interpreter."""
-  return "1" if IsPatched() else "0"
-
-
-if __name__ == '__main__':
-  print DoMain([])