readme: Remove codacy github badge

Author: gsantner

README.md

@@ -4,7 +4,6 @@
 [![Donate - say thanks](https://img.shields.io/badge/donate-say%20thanks-red.svg)](https://gsantner.net/page/supportme.html?project=markor&source=readme)
 [![Chat on Matrix](https://img.shields.io/badge/chat-matrix-blue.svg)](https://matrix.to/#/#markor:matrix.org)
 [![GitHub CI](https://github.com/gsantner/markor/workflows/CI/badge.svg)](https://github.com/gsantner/markor/actions)
-[![Codacy code quality](https://img.shields.io/codacy/grade/aff869c440bc48b7bd64680e97cbc453)](https://www.codacy.com/app/gsantner/markor)
 
 
 # Markor