Remove Video Source

Hi, I recently upgraded my Intel MacBookPro to a M1 MacBookPro. I used Migration Assistant to move everything from my old system to my new one. Everything currently works fine, but…
My video source list seems to “remember” my old built in camera so it shows it on the Video source strip across the bottom of the screen even though there is no video input. I want to remove this invalid video source but can not figure out how to do it.

Can anyone tell me how to remove a video source from the Mac version?