removed note on compatible symfony2 versions

Author: lsmith77

README.md

@@ -4,7 +4,6 @@ CacheControlBundle
 This Bundle provides a way to set path based cache expiration headers via the
 app configuration and provides a helper to control the reverse proxy varnish.
 
-This bundle works with Symfony 2.1 and 2.2.
 
 [![Build Status](https://secure.travis-ci.org/liip/LiipCacheControlBundle.png)](http://travis-ci.org/liip/LiipCacheControlBundle)