I use lpadmin -x to remove printers when needed as in:

lpadmin -x Spencer-116-Color

lpadmin can be used for a bunch of other chores.  See:

https://developer.apple.com/library/mac/documentation/Darwin/Reference/Manpages/man8/lpadmin.8.html

Interestingly, the -x option isn’t listed in the man page!

See also: http://hints.macworld.com/article.php?story=20061203221317612 For additional options like clearing queues …