Update README.md

Author: alexsoft

README.md

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 # Pushbullet notification channel for Laravel
 
 [![Latest Version on Packagist](https://img.shields.io/packagist/v/laravel-notification-channels/pushbullet.svg?style=flat-square)](https://packagist.org/packages/laravel-notification-channels/pushbullet)
-[![Software License](https://img.shields.io/badge/license-MIT-brightgreen.svg?style=flat-square)](LICENSE.md)
 [![Build Status](https://img.shields.io/travis/laravel-notification-channels/pushbullet/master.svg?style=flat-square)](https://travis-ci.org/laravel-notification-channels/pushbullet)
 [![StyleCI](https://styleci.io/repos/65558300/shield)](https://styleci.io/repos/65558300)
 [![SensioLabsInsight](https://img.shields.io/sensiolabs/i/2283805a-e7cc-4e83-8cda-b91b8336cb57.svg?style=flat-square)](https://insight.sensiolabs.com/projects/2283805a-e7cc-4e83-8cda-b91b8336cb57)