As it is the case into the b4a-ide, with the unused libraries (automatic alert message to unchek a library if its unused)
to lighten the final apk, Should i delete additional libraries from the folder recorded into the path "additional libraries" when they are unused before to compile, or its not important because the compiler skip it in that case ?
it is not important. Not used libraries are not bound to the APK.
In the six years i am using b4a now i never needs to delete a library from the addlibs folder. If i dont use it it is not part of the apk.