BUR #10330 has been approved by @evazion.
remove implication thigh_boots -> thighhighs
This implication is extremely stupid for an extremely simple reason - thigh boots are not thighhighs. It makes zero sense on any level.
The only reason I can think this would be even vaguely useful for is stuff like cowboy_shot posts where it's ambiguous whether it's boots or thighhighs, in which case it should just be tagged whatever it most resembles rather than both.