docs, README: Remove the broken Codacy badge

Signed-off-by: Kai Krakow <kai@kaishome.de>

docs/README.md

@@ -4,7 +4,6 @@ If you want to support me or accelerate the development of a special feature, co
 Just leave a message if your donation is for a specific use (like a new hardware or a specific function).
 
 [![Build Status](https://dev.azure.com/dollingerflorian/dollingerflorian/_apis/build/status/atar-axis.xpadneo?branchName=master)](https://dev.azure.com/dollingerflorian/dollingerflorian/_build/latest?definitionId=1?branchName=master)
-[![Codacy Badge](https://api.codacy.com/project/badge/Grade/7bba9bae5e6e493189969dd2a80ac09e)](https://www.codacy.com/app/atar-axis/xpadneo?utm_source=github.com&utm_medium=referral&utm_content=atar-axis/xpadneo&utm_campaign=Badge_Grade)
 [![Average time to resolve an issue](http://isitmaintained.com/badge/resolution/atar-axis/xpadneo.svg)](http://isitmaintained.com/project/atar-axis/xpadneo "Average time to resolve an issue")
 [![Packaging status](https://repology.org/badge/tiny-repos/xpadneo.svg)](https://repology.org/project/xpadneo/versions)
 [![Discord](https://img.shields.io/discord/733964971842732042)](https://discord.gg/nCqfKa84KA)