unitframes: remove attributes during creation

api/unitframes.lua

@@ -892,13 +892,10 @@ function pfUI.uf:EnableScripts()
   local f = self
 
   -- handle secure unit button templates (> vanilla)
-  if f.SetAttribute and RegisterStateDriver then
+  if f.SetAttribute then
     f.showmenu = pfUI.uf.RightClickAction
-    f:SetAttribute("unit", f.label .. f.id)
     f:SetAttribute("type1", "target")
     f:SetAttribute("type2", "showmenu")
-    f.visibilitycondition = string.format("[target=%s%s,exists] show; hide", f.label, f.id)
-    RegisterStateDriver(f, 'visibility', f.visibilitycondition)
   else
     f:SetScript("OnClick", pfUI.uf.OnClick)
   end