002643dcf0
This commit removes the `librustuv` crate. See the [runtime removal RFC](https://github.com/rust-lang/rfcs/pull/230) for more context. See [green-rs](https://github.com/alexcrichton/green-rs/) for a possible migration path if you wish to continue using green-threaded I/O. The library provides its own I/O API surface. [breaking-change]