Update README.md

Drop 2 badges as not reliable.

README.md

@@ -3,9 +3,7 @@
 A CLI tool to analyze composer dependencies and verify that no unknown symbols are used in the sources of a package.
 This will prevent you from using "soft" dependencies that are not defined within your `composer.json` require section.
 
-[![PHP ^8.2](https://img.shields.io/badge/PHP-^8.2-brightgreen.svg?style=flat-square)](https://php.net)
 [![current version](https://img.shields.io/packagist/v/maglnet/composer-require-checker.svg?style=flat-square)](https://packagist.org/packages/maglnet/composer-require-checker)
-[![Build Status](https://img.shields.io/travis/maglnet/ComposerRequireChecker.svg?style=flat-square)](https://travis-ci.org/maglnet/ComposerRequireChecker)
 
 ## What's it about?