Revert of Mojo multiple command buffer support and sample

mojo/services/public/interfaces/gpu/gpu.mojom

Index: mojo/services/public/interfaces/gpu/gpu.mojom
diff --git a/mojo/services/public/interfaces/gpu/gpu.mojom b/mojo/services/public/interfaces/gpu/gpu.mojom
deleted file mode 100644
index d6629cd39ac1e05761d2fadaf070159a13c09c45..0000000000000000000000000000000000000000
--- a/mojo/services/public/interfaces/gpu/gpu.mojom
+++ /dev/null
@@ -1,15 +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.
-
-import "mojo/services/gles2/command_buffer.mojom"
-import "mojo/services/public/interfaces/geometry/geometry.mojom"
-
-module mojo {
-
-interface Gpu {
-  CreateOnscreenGLES2Context(uint64 native_viewport_id, Size size, CommandBuffer& gles2_client);
-  CreateOffscreenGLES2Context(CommandBuffer& gles2_client);
-};
-
-}