Revert of Add command_buffer_gles2

gpu/command_buffer_gles2/command_buffer_gles2.gyp

-# Copyright 2015 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.
-
-{
-  'variables': {
-    'chromium_code': 1,
-  },
-  'targets': [
-    {
-      # GN version: //gpu:command_buffer_gles2
-      'target_name': 'command_buffer_gles2',
-      'type': 'shared_library',
-      'dependencies': [
-        '../../base/base.gyp:base',
-        '../../gpu/gpu.gyp:gles2_c_lib',
-        '../../gpu/gpu.gyp:gles2_implementation',
-        '../../gpu/gpu.gyp:command_buffer_service',
-        '../../ui/gfx/gfx.gyp:gfx_geometry',
-        '../../ui/gl/gl.gyp:gl',
-      ],
-      'sources': [
-        # Note: sources list duplicated in GN build.
-        # TODO(hendrikw): Move egl out of gles2_conform_support.
-        '../gles2_conform_support/egl/config.cc',
-        '../gles2_conform_support/egl/config.h',
-        '../gles2_conform_support/egl/display.cc',
-        '../gles2_conform_support/egl/display.h',
-        '../gles2_conform_support/egl/egl.cc',
-        '../gles2_conform_support/egl/surface.cc',
-        '../gles2_conform_support/egl/surface.h',
-        'command_buffer_egl.cc',
-      ],
-      'defines': [
-        'EGLAPI=',
-        'EGLAPIENTRY=',
-      ],
-    },
-  ],
-}