Update README.md

Author: garyb

README.md

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 [![Latest release](http://img.shields.io/github/release/slamdata/purescript-pathy.svg)](https://github.com/slamdata/purescript-pathy/releases)
 [![Build status](https://travis-ci.org/slamdata/purescript-pathy.svg?branch=master)](https://travis-ci.org/slamdata/purescript-pathy)
-[![Dependency status](https://img.shields.io/librariesio/github/slamdata/purescript-pathy.svg)](https://libraries.io/github/slamdata/purescript-pathy)
 
 A type-safe abstraction for platform-independent file system paths.