Remove wm_flow, browser, nesting_app examples

examples/window_manager/window_manager.mojom

Index: examples/window_manager/window_manager.mojom
diff --git a/examples/window_manager/window_manager.mojom b/examples/window_manager/window_manager.mojom
deleted file mode 100644
index d2e161f8210ae57ec12482f679760759f43e267e..0000000000000000000000000000000000000000
--- a/examples/window_manager/window_manager.mojom
+++ /dev/null
@@ -1,11 +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.
-
-module examples;
-
-import "mojo/services/geometry/interfaces/geometry.mojom";
-
-interface IWindowManager {
-  CloseWindow(uint32 node_id);
-};