std: Remove PlatformThread spawn mode. Obsolete

src/test/run-pass/platform_thread.rs

@@ -1,44 +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.
-
-// Jump back and forth between the OS main thread and a new scheduler.
-// The OS main scheduler should continue to be available and not terminate
-// while it is not in use.
-
-use std::task;
-
-pub fn main() {
-    run(100);
-}
-
-fn run(i: int) {
-
-    info!(i);
-
-    if i == 0 {
-        return;
-    }
-
-    let mut builder = task::task();
-    builder.sched_mode(task::PlatformThread);
-    builder.unlinked();
-    do builder.spawn {
-        task::yield();
-        let mut builder = task::task();
-        builder.sched_mode(task::SingleThreaded);
-        builder.unlinked();
-        do builder.spawn {
-            task::yield();
-            run(i - 1);
-            task::yield();
-        }
-        task::yield();
-    }
-}