readme: remove Rust from users

Closes #1572

Author: Elijah Andrews

README.md

@@ -4,8 +4,7 @@
 
 libuv is a multi-platform support library with a focus on asynchronous I/O. It
 was primarily developed for use by [Node.js](http://nodejs.org), but it's also
-used by Mozilla's [Rust language](http://www.rust-lang.org/),
-[Luvit](http://luvit.io/), [Julia](http://julialang.org/),
+used by [Luvit](http://luvit.io/), [Julia](http://julialang.org/),
 [pyuv](https://github.com/saghul/pyuv), and [others](https://github.com/joyent/libuv/wiki/Projects-that-use-libuv).
 
 ## Feature highlights

docs/src/index.rst

@@ -6,15 +6,14 @@ Overview
 --------
 
 libuv is a multi-platform support library with a focus on asynchronous I/O. It
-was primarily developed for use by `Node.js`_, but it's also used by Mozilla's
-`Rust language`_, `Luvit`_, `Julia`_, `pyuv`_, and `others`_.
+was primarily developed for use by `Node.js`_, but it's also used by `Luvit`_,
+`Julia`_, `pyuv`_, and `others`_.
 
 .. note::
     In case you find errors in this documentation you can help by sending
     `pull requests <https://github.com/joyent/libuv>`_!
 
 .. _Node.js: http://nodejs.org
-.. _Rust language: http://www.rust-lang.org
 .. _Luvit: http://luvit.io
 .. _Julia: http://julialang.org
 .. _pyuv: https://github.com/saghul/pyuv