Rollup merge of #23099 - brson:lint-cstack, r=alexcrichton

src/test/run-pass/lint-cstack.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 libc;
-
-extern {
-    fn rust_get_test_int() -> libc::intptr_t;
-}
-
-trait A {
-    fn foo(&self) {
-        unsafe {
-            rust_get_test_int();
-        }
-    }
-}
-
-pub fn main() {
-}