Remove license badge

Author: sagikazarmark

README.md

@@ -1,7 +1,6 @@
 # HTTP Message
 
 [![Latest Version](https://img.shields.io/github/release/php-http/message.svg?style=flat-square)](https://github.com/php-http/message/releases)
-[![Software License](https://img.shields.io/badge/license-MIT-brightgreen.svg?style=flat-square)](LICENSE)
 [![Build Status](https://img.shields.io/travis/php-http/message.svg?style=flat-square)](https://travis-ci.org/php-http/message)
 [![Code Coverage](https://img.shields.io/scrutinizer/coverage/g/php-http/message.svg?style=flat-square)](https://scrutinizer-ci.com/g/php-http/message)
 [![Quality Score](https://img.shields.io/scrutinizer/g/php-http/message.svg?style=flat-square)](https://scrutinizer-ci.com/g/php-http/message)