mozilla/rust — pull request #5104 by alexcrichton (2013-02-25 17:19:22+00:00)
Title: Fix various cases with unused imports

The first commit fixes warnings about `pub use` imports because it can't be known whether those are actually used or not.

The second commit fixes using `#[level(unused_imports)]` style control over the emission of warnings. Before it looked like it only worked as a command-line flag.