auto merge of servo#3792 : samlh/servo/patch-1, r=jdm

Small drive-by update to the style crate readme.

Author: bors-servo

components/style/README.md

@@ -1,6 +1,4 @@
 servo-style
 ===========
 
-Prototype replacement style system for Servo,
-based on [rust-cssparser](https://github.com/mozilla-servo/rust-cssparser)
-instead of [NetSurf’s libcss](https://github.com/mozilla-servo/libcss).
+Style system for Servo, using [rust-cssparser](https://github.com/mozilla-servo/rust-cssparser) for parsing.