How to remove old unavailable Tradfri entities?

Two of my Tradfri bulbs were broken so I swapped them out at IKEA for new ones. The two old bulbs still show up on the Tradfri integration page as unavailable entities. I’d like to remove them. How do I do that?

I’m only guessing, but I think you could delete them from the TRADFRI app, i e from the TRADFRI gateway.