UnregisterEventFromAllFrames

Globally unregister event.
== Code ==
 local function UnregisterEventFromAllFrames_helper(event, ...)
 	for i=1,select('#', ...) do
 		select(i, ...):UnregisterEvent(event)
 	end
 end
 
 local function UnregisterEventFromAllFrames(event)
 	UnregisterEventFromAllFrames_helper(event, GetFramesRegisteredForEvent(event))
 end
== Example ==
 -- Globally unregister the event 'MERCHANT_SHOW'.
 UnregisterEventFromAllFrames('MERCHANT_SHOW')