I'd say to reject the suggestion and to get rid of the tag.

Creating / editing a tag wiki excerpt for a tag that has no reason to exist puts the cart before the horse, and shouldn't be encouraged.

I'd say to reject the suggestion and to get rid of the tag.

Creating / editing a tag wiki excerpt for a tag that has no reason to exist puts the cart before the horse, and shouldn't be encouraged: much like useless edits it wastes reviewers' time for no benefit, since the tag is to be removed.