Remove full descriptor print

This library prints the full byte string of USB descriptors. It was helpful during development but not really necessary for the end user to see it in serial console.

If we want it to stay it could have a verbose flag, but I'm inclined to remove it altogether unless/until someone else has a use for it.

Search the library for the serial print that emits the full USB descriptor byte string and read the surrounding USB-host code first. Remove that development output, then exercise the mouse library and verify that normal user-facing serial output no longer includes the full descriptor.

Written by the indexing model from the issue text.