The library was inherited from the "Arduino AVR Boards" platform that was the model for this project. It is used by the ATmega32U4-based boards of Arduino AVR Boards, however this platform's boards do not have a native HID capability and so the library serves no purpose, and in fact will not even compile for this platform's boards. So it will be best to remove it.
The library was inherited from the "Arduino AVR Boards" platform that was the model for this project. It is used by the ATmega32U4-based boards of Arduino AVR Boards, however this platform's boards do not have a native HID capability and so the library serves no purpose, and in fact will not even compile for this platform's boards. So it will be best to remove it.
Reference: https://github.com/arduino/ArduinoCore-megaavr/issues/108#issuecomment-917986118
Fixes https://github.com/arduino/ArduinoCore-megaavr/issues/108 (thanks @RoiEXLab !)