See lpadmin(1M) and lpsched(1M) for details on the command options.
Ensure that you have superuser capabilities.
Remove the printer from the class. For example, to remove printer laser1 from class laser:
# /usr/sbin/lpadmin -plaser1 -rlaser
Start the LP spooler if it is not already running:
# /usr/sbin/lpsched