Don't forcefully show Blizzard frame

This enables other mods to hide Vigor even if IceHUD is told not to.

modules/DragonridingVigor.lua

@@ -71,8 +71,6 @@ function DragonridingVigor.prototype:UpdateVigorRecharge(event, widget)
 	if event ~= "internal" then
 		if self.moduleSettings.hideBlizz then
 			self:HideBlizz()
-		else
-			self:ShowBlizz()
 		end
 	end