remove c6
@@ -258,7 +258,6 @@ Please take a quick gander at the [contribution guidelines](https://github.com/a
*Libraries for preprocessing CSS files.*
-* [c6](https://github.com/c9s/c6) - High performance SASS compatible-implementation compiler written in Go.
* [gcss](https://github.com/yosssi/gcss) - Pure Go CSS Preprocessor.
* [go-libsass](https://github.com/wellington/go-libsass) - Go wrapper to the 100% Sass compatible libsass project.
