Revert of Start of display management for mus

components/mus/public/interfaces/display.mojom

Index: components/mus/public/interfaces/display.mojom
diff --git a/components/mus/public/interfaces/display.mojom b/components/mus/public/interfaces/display.mojom
deleted file mode 100644
index 71364999b0ab75a82dc45714cd4507e0b101fc56..0000000000000000000000000000000000000000
--- a/components/mus/public/interfaces/display.mojom
+++ /dev/null
@@ -1,25 +0,0 @@
-// Copyright 2016 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.
-
-module mus.mojom;
-
-import "components/mus/public/interfaces/window_manager_constants.mojom";
-
-interface DisplayManagerObserver {
-  // Sent when the observer is added. Gives the initial state.
-  OnDisplays(array<Display> displays);
-
-  // The specified set of displays has changed in some way. This is used both
-  // when a new display is added, or when a property of a display changes.
-  // |displays| does not necessarily contain the complete set of displays,
-  // only those that changed.
-  OnDisplaysChanged(array<Display> displays);
-
-  // An existing display was removed.
-  OnDisplayRemoved(int64 id);
-};
-
-interface DisplayManager {
-  AddObserver(DisplayManagerObserver observer);
-};