Remove all .gyp and .gypi files.

third_party/khronos/khronos.gyp

Index: third_party/khronos/khronos.gyp
diff --git a/third_party/khronos/khronos.gyp b/third_party/khronos/khronos.gyp
deleted file mode 100644
index 8a855728d52823ed8be854261f90841c14b773e3..0000000000000000000000000000000000000000
--- a/third_party/khronos/khronos.gyp
+++ /dev/null
@@ -1,18 +0,0 @@
-# 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.
-
-{
-  'targets': [
-    {
-      'target_name': 'khronos_headers',
-      'type': 'none',
-      'all_dependent_settings': {
-        'include_dirs': [
-          '.',
-          '../../gpu',  # Contains GLES2/gl2chromium.h
-        ],
-      },
-    },
-  ],
-}