remove packagist banner from readme

Author: anolilab

README.md

@@ -1,7 +1,6 @@
 # php-cs-fixer-config
 
 [![Author](http://img.shields.io/badge/[email protected]?style=flat-square)](https://twitter.com/anolilab)
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 [![Software License](https://img.shields.io/badge/license-MIT-brightgreen.svg?style=flat-square)](LICENSE)