Revert 170387 as it fails presubmit checks locally and on the trybots

tools/valgrind/unused_suppressions.py

Index: tools/valgrind/unused_suppressions.py
===================================================================
--- tools/valgrind/unused_suppressions.py	(revision 170726)
+++ tools/valgrind/unused_suppressions.py	(working copy)
@@ -1,24 +0,0 @@
-#!/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.
-
-import sys
-import urllib2
-
-import suppressions
-
-
-def main():
-  supp = suppressions.GetSuppressions()
-
-  all_supps = []
-  for supps in supp.values():
-    all_supps += [s.description for s in supps]
-  sys.stdout.write(urllib2.urlopen(
-      'http://chromium-build-logs.appspot.com/unused_suppressions',
-      '\n'.join(all_supps)).read())
-  return 0
-
-if __name__ == "__main__":
-  sys.exit(main())