Remove duplicates from micro frameworks/routers

README.md

 * [Slim](http://www.slimframework.com/) - Another simple micro framework.
 * [Bullet PHP](http://bulletphp.com/) - A micro framework for building REST APIs.
 * [Lumen](http://lumen.laravel.com) - A micro-framework by Laravel.
-* [Fast Route](https://github.com/nikic/FastRoute) - A fast routing library.
-* [Pux](https://github.com/c9s/Pux) - Another fast routing library.
 * [Proton](https://github.com/alexbilbie/Proton) - A StackPHP compatible micro framework
 
 ## Micro Framework Extras