Remove the compile-fail test that's now obsolete

src/test/compile-fail/mutex-arc-nested.rs

@@ -1,26 +0,0 @@
-// Copyright 2013 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.
-
-extern crate sync;
-
-use std::task;
-use sync::MutexArc;
-
-fn test_mutex_arc_nested() {
-    let arc = ~MutexArc::new(1);
-    let arc2 = ~MutexArc::new(*arc);
-
-    task::spawn(proc() {
-        (*arc2).access(|mutex| { //~ ERROR instantiating a type parameter with an incompatible type
-        })
-    });
-}
-
-fn main() {}