github-19: remove coveralls status

Author: ArturMoczulski

README.md

@@ -1,7 +1,7 @@
 Laravel Rollbar
 ===============
 
-[![Build Status](http://img.shields.io/travis/jenssegers/laravel-rollbar.svg)](https://travis-ci.org/jenssegers/laravel-rollbar) [![Coverage Status](http://img.shields.io/coveralls/jenssegers/laravel-rollbar.svg)](https://coveralls.io/r/jenssegers/laravel-rollbar)
+[![Build Status](https://travis-ci.org/rollbar/rollbar-php-laravel.svg?branch=master)](https://travis-ci.org/rollbar/rollbar-laravel) 
 
 Rollbar error monitoring integration for Laravel projects. This library adds a listener to Laravel's logging component. Laravel's session information will be sent in to Rollbar, as well as some other helpful information such as 'environment', 'server', and 'session'.