Remove GYP files.

third_party/android_opengl/etc1/etc1.gyp

Index: third_party/android_opengl/etc1/etc1.gyp
diff --git a/third_party/android_opengl/etc1/etc1.gyp b/third_party/android_opengl/etc1/etc1.gyp
deleted file mode 100644
index 3445a677c435f52d2561e02cbad48a7896a742a2..0000000000000000000000000000000000000000
--- a/third_party/android_opengl/etc1/etc1.gyp
+++ /dev/null
@@ -1,17 +0,0 @@
-# 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.
-
-{
-  'targets': [
-    {
-      # GN: //third_party/android_opengl/etc1:etc1
-      'target_name': 'etc1',
-      'type': 'static_library',
-      'sources': [
-        'etc1.cpp',
-        'etc1.h',
-      ],
-    },
-  ]
-}