Remove travis build status

Author: jessarcher

README.md

@@ -1,7 +1,6 @@
 # Laravel Castable Data Transfer Object
 
 [![Latest Version on Packagist](https://img.shields.io/packagist/v/jessarcher/laravel-castable-data-transfer-object.svg?style=flat-square)](https://packagist.org/packages/jessarcher/laravel-castable-data-transfer-object)
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 [![Quality Score](https://img.shields.io/scrutinizer/g/jessarcher/laravel-castable-data-transfer-object.svg?style=flat-square)](https://scrutinizer-ci.com/g/jessarcher/laravel-castable-data-transfer-object)
 [![Total Downloads](https://img.shields.io/packagist/dt/jessarcher/laravel-castable-data-transfer-object.svg?style=flat-square)](https://packagist.org/packages/jessarcher/laravel-castable-data-transfer-object)