gpu: Remove release-after-use workaround.

ui/gl/gl_image.cc

Index: ui/gl/gl_image.cc
diff --git a/ui/gl/gl_image.cc b/ui/gl/gl_image.cc
deleted file mode 100644
index 8907c6d8e67c65291fd24b606680f960199dad04..0000000000000000000000000000000000000000
--- a/ui/gl/gl_image.cc
+++ /dev/null
@@ -1,21 +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.
-
-#include "ui/gl/gl_image.h"
-
-namespace gfx {
-
-GLImage::GLImage() {
-}
-
-GLImage::~GLImage() {
-}
-
-bool GLImage::CopyTexImage(unsigned target) { return false; }
-
-void GLImage::SetReleaseAfterUse() {
-  // Default no-op implementation for workaround.
-}
-
-}  // namespace gfx