Removed btn99x0 library

The library has been  first released under the wrong repo name and thus url. The new url and library has been already added. This url no longer exist.

Author: jaenrig-ifx

repositories.txt

@@ -2050,7 +2050,6 @@ https://github.com/Industruino/FRAM
 https://github.com/Industruino/Indio
 https://github.com/Industruino/UC1701
 https://github.com/INFICON-Spot/inficon-spot-lib
-https://github.com/Infineon/arduino-btn99x0
 https://github.com/Infineon/arduino-motix-btn99x0
 https://github.com/Infineon/arduino-high-side-switch
 https://github.com/Infineon/arduino-optiga-trust-m