Delete unnecessary mode code in ozone/drm

ui/ozone/common/display_mode_proxy.cc

-// 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.
-
-#include "base/memory/ptr_util.h"
-
-#include "ui/ozone/common/display_mode_proxy.h"
-
-#include "ui/ozone/common/gpu/ozone_gpu_message_params.h"
-
-namespace ui {
-
-DisplayModeProxy::DisplayModeProxy(const DisplayMode_Params& params)
-    : DisplayMode(params.size, params.is_interlaced, params.refresh_rate) {
-}
-
-DisplayModeProxy::DisplayModeProxy(const gfx::Size& size,
-                                   bool interlaced,
-                                   float refresh_rate)
-    : DisplayMode(size, interlaced, refresh_rate) {}
-
-DisplayModeProxy::~DisplayModeProxy() {
-}
-
-std::unique_ptr<display::DisplayMode> DisplayModeProxy::Clone() const {
-  return base::WrapUnique(
-      new DisplayModeProxy(size(), is_interlaced(), refresh_rate()));
-}
-
-}  // namespace ui