Originally there were 10 questions associated with the character-design tag. I believed that character design is intrinsically not worldbuilding and with so few questions attached, I began to remove that tag and, where possible, attach a tag that made more sense (like creature-design).
However, I can't remove the tag from one question on the list. This one, which has been migrated to Writing.SE.
With the automation take care of this (the automatic garbage collection), or must something be done to remove the WB.SE tag from what is now a W.SE question?