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

mojo/public/c/include/mojo/system/main.h

Index: mojo/public/c/include/mojo/system/main.h
diff --git a/mojo/public/c/include/mojo/system/main.h b/mojo/public/c/include/mojo/system/main.h
deleted file mode 100644
index 23cbc216c7ab57b5e574e502778070f1a50691c8..0000000000000000000000000000000000000000
--- a/mojo/public/c/include/mojo/system/main.h
+++ /dev/null
@@ -1,25 +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.
-
-#ifndef MOJO_PUBLIC_C_INCLUDE_MOJO_SYSTEM_MAIN_H_
-#define MOJO_PUBLIC_C_INCLUDE_MOJO_SYSTEM_MAIN_H_
-
-#include <mojo/macros.h>
-#include <mojo/result.h>
-#include <mojo/system/handle.h>
-
-// Implement MojoMain directly as the entry point for an application.
-//
-// MojoResult MojoMain(MojoHandle application_request) {
-//   ...
-// }
-
-MOJO_BEGIN_EXTERN_C
-
-__attribute__((visibility("default"))) MojoResult MojoMain(
-    MojoHandle application_request);
-
-MOJO_END_EXTERN_C
-
-#endif  // MOJO_PUBLIC_C_INCLUDE_MOJO_SYSTEM_MAIN_H_