Update README.md -- rm codefactor

Author: thierrymoudiki

README.md

@@ -4,7 +4,6 @@
 
 ![PyPI](https://img.shields.io/pypi/v/the-teller) [![PyPI - License](https://img.shields.io/pypi/l/the-teller)](https://github.com/thierrymoudiki/teller/blob/master/LICENSE) [![Downloads](https://pepy.tech/badge/the-teller)](https://pepy.tech/project/the-teller) 
 [![HitCount](https://hits.dwyl.com/Techtonique/teller.svg?style=flat-square)](http://hits.dwyl.com/Techtonique/teller)
-[![CodeFactor](https://www.codefactor.io/repository/github/techtonique/teller/badge)](https://www.codefactor.io/repository/github/techtonique/teller)
 [![Documentation](https://img.shields.io/badge/documentation-is_here-green)](https://techtonique.github.io/teller/)