These are items from 1.x that were required for entry to primal battles. Should I hold onto these? Are they used at all in ARR?

My guess is they might be used for hard mode primal battles or item exchange. It would be nice to get a rep response on this matter. Right now they are just wasting space in my inventory, but I don't want to throw them away if they are still important or going to be used in the future.