Removes example code that isn't correctly wired up

mash/screenlock/main.cc

Index: mash/screenlock/main.cc
diff --git a/mash/screenlock/main.cc b/mash/screenlock/main.cc
deleted file mode 100644
index 2e5392a492841809e9ea57262e0827cf0a84ad54..0000000000000000000000000000000000000000
--- a/mash/screenlock/main.cc
+++ /dev/null
@@ -1,12 +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.
-
-#include "mash/screenlock/screenlock.h"
-#include "services/service_manager/public/c/main.h"
-#include "services/service_manager/public/cpp/service_runner.h"
-
-MojoResult ServiceMain(MojoHandle service_request_handle) {
-  service_manager::ServiceRunner runner(new mash::screenlock::Screenlock);
-  return runner.Run(service_request_handle);
-}