Mojo: Remove unused hello_world_service code

mojo/examples/hello_world_service/hello_world_service.mojom

Index: mojo/examples/hello_world_service/hello_world_service.mojom
diff --git a/mojo/examples/hello_world_service/hello_world_service.mojom b/mojo/examples/hello_world_service/hello_world_service.mojom
deleted file mode 100644
index 5f03d69acb600626c5de428b35a0720ef1c73f73..0000000000000000000000000000000000000000
--- a/mojo/examples/hello_world_service/hello_world_service.mojom
+++ /dev/null
@@ -1,17 +0,0 @@
-// Copyright 2013 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 mojo {
-
-[Peer=HelloWorldClient]
-interface HelloWorldService {
-  void Greeting(string greeting);
-};
-
-[Peer=HelloWorldService]
-interface HelloWorldClient {
-  void DidReceiveGreeting(int32 result);
-};
-
-}