How do you remove a client from a Linus machine? How do you stop it from autoloading when the system boots?
you can go in the rc scripts (/etc/rc.d/* or /etc/init.d) and rename the BB startup scripts to prevent them from executed at startup.
Or if you do not need BB at all, remove those scripts and also remove $BBHOME directory. For final cleanup, you may want to remove the BB user also.