Update README.md

Author: garyb

README.md

@@ -3,7 +3,7 @@ purescript-transformers
 
 [![Build Status](https://travis-ci.org/purescript-contrib/purescript-transformers.svg?branch=master)](https://travis-ci.org/purescript-contrib/purescript-transformers)
 
-Monad transformers based on [mtl](http://hackage.haskell.org/package/mtl). Also includes `Control.Monad.Free`.
+Monad transformers based on [mtl](http://hackage.haskell.org/package/mtl).
 
 - [Module documentation](docs/Module.md)
 - [Examples](examples/)