Deprecate shiny

Posted under Tags

BUR #13708 has been approved by @evazion.

remove implication shiny_hair -> shiny
remove implication shiny_clothes -> shiny
remove implication shiny_skin -> shiny
mass update shiny shiny_* -> -shiny
deprecate shiny

shiny is a 200k tag that only exists due to its three-pronged implication to shiny_hair, shiny_skin and shiny_clothes. It has barely 5000 posts that don't have any shiny_x tags, making it essentially pointless in lieu of those more specific implications.