I was doing some cleanup and noticed a typo tag. (plumbiing instead of plumbing) I retagged the question, but the old typo tag is still there, even though no question uses it. Does this require mod attention, or will it just go away after a period of not being used? Or are we stuck with a plumbiing tag?
Unused (or seldom-used) tags will get deleted after six months. Moderators can also remove tags, so elect them! Since you can't flag a tag for moderator attention, you could flag your own post, but I don't think the traffic on this meta site is so overwhelming your question will get buried otherwise.
If there are no posts with the "plumbiing" tag it shouldn't get suggested as a possible tag after 24 hours.