Remove test issue-3461

According to issue #3461, it doesn't sound like this is planned to be fixed.

src/test/run-pass/issue-3461.rs

@@ -1,17 +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.
-
-// xfail-test
-pub fn main() {
-
-    fn foo() { }
-
-    let bar: ~fn() = ~foo;
-}