Remove PPAPI gyp files.

ppapi/tools/ppapi_tools.gyp

Index: ppapi/tools/ppapi_tools.gyp
diff --git a/ppapi/tools/ppapi_tools.gyp b/ppapi/tools/ppapi_tools.gyp
deleted file mode 100644
index 67986ff19a2527e5939aaf92850953b3acbc9368..0000000000000000000000000000000000000000
--- a/ppapi/tools/ppapi_tools.gyp
+++ /dev/null
@@ -1,18 +0,0 @@
-# Copyright (c) 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.
-
-{
-  'targets': [
-    {
-      'target_name': 'pepper_hash_for_uma',
-      'type': 'executable',
-      'dependencies': [
-        '../../base/base.gyp:base'
-      ],
-      'sources': [
-        'pepper_hash_for_uma.cc',
-      ],
-    }
-  ]
-}