Revert "librustc: Make unqualified identifier searches terminate at the nearest module scope. r=tjc"

This reverts commit a8d37af247.

src/libstd/future.rs

@@ -26,7 +26,6 @@ use core::cast;
 use core::either::Either;
 use core::option;
 use core::pipes::{recv, oneshot, ChanOne, PortOne, send_one, recv_one};
-use core::prelude::*;
 use core::task;
 
 #[doc = "The future type"]
@@ -146,10 +145,6 @@ pub fn spawn<A:Owned>(blk: fn~() -> A) -> Future<A> {
 
 #[allow(non_implicitly_copyable_typarams)]
 pub mod test {
-    use core::prelude::*;
-
-    use future::*;
-
     use core::pipes::oneshot;
     use core::task;