views: Remove dead code.

ui/views/mus/display_converter.cc

-// 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.
-
-#include "ui/views/mus/display_converter.h"
-
-#include <stdint.h>
-
-#include "components/mus/public/cpp/window.h"
-#include "mojo/converters/geometry/geometry_type_converters.h"
-
-namespace views {
-
-std::vector<display::Display> GetDisplaysFromWindow(mus::Window* window) {
-  static int64_t synthesized_display_id = 2000;
-  display::Display display;
-  display.set_id(synthesized_display_id++);
-  display.SetScaleAndBounds(
-      window->viewport_metrics().device_pixel_ratio,
-      gfx::Rect(window->viewport_metrics().size_in_pixels.To<gfx::Size>()));
-  std::vector<display::Display> displays;
-  displays.push_back(display);
-  return displays;
-}
-
-}  // namespace views