Revert of Start of display management for mus

ui/views/mus/BUILD.gn

 # 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("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//mojo/public/mojo_application.gni")
 import("//testing/test.gni")
 import("//tools/grit/repack.gni")
 
 component("mus") {
   output_name = "ui_views_mus_lib"
 
   sources = [
     "aura_init.cc",
     "aura_init.h",
     "display_converter.cc",
     "display_converter.h",
     "input_method_mus.cc",
     "input_method_mus.h",
     "mus_export.h",
     "native_widget_mus.cc",
     "native_widget_mus.h",
     "platform_window_mus.cc",
     "platform_window_mus.h",
-    "screen_mus.cc",
-    "screen_mus.h",
     "surface_binding.cc",
     "surface_binding.h",
     "surface_context_factory.cc",
     "surface_context_factory.h",
     "window_manager_connection.cc",
     "window_manager_connection.h",
     "window_manager_constants_converters.cc",
     "window_manager_constants_converters.h",
     "window_manager_frame_values.cc",
     "window_manager_frame_values.h",
@@ skipping 176 matching lines @@
 }
 
 group("for_component") {
   public_deps = [
     ":mus",
   ]
   deps = [
     "//mojo/gles2",
   ]
 }