Make the fuchsia mojo/public repo the source of truth.

mojo/public/cpp/application/lib/application_test_main.cc

Index: mojo/public/cpp/application/lib/application_test_main.cc
diff --git a/mojo/public/cpp/application/lib/application_test_main.cc b/mojo/public/cpp/application/lib/application_test_main.cc
deleted file mode 100644
index 8f6f688fd2b9c39190695f782f93382b210a3d57..0000000000000000000000000000000000000000
--- a/mojo/public/cpp/application/lib/application_test_main.cc
+++ /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.
-
-#include <mojo/system/main.h>
-
-#include "mojo/public/cpp/application/application_test_base.h"
-
-MojoResult MojoMain(MojoHandle handle) {
-  return mojo::test::RunAllTests(handle);
-}