rt: Remove empty rust_upcall.h

src/rt/rust_upcall.cpp

@@ -17,7 +17,6 @@
  */
 
 #include "rust_globals.h"
-#include "rust_upcall.h"
 #include "rust_util.h"
 
 //Unwinding ABI declarations.

src/rt/rust_upcall.h

@@ -1,14 +0,0 @@
-// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-#ifndef RUST_UPCALL_H
-#define RUST_UPCALL_H
-
-#endif