I found some attempts to show a modern sitcom without the "audience" laughter, and was surprised they were done by hand muting the entire audio.
Is there no automated way to remove a laugh track from a video?
I was thinking that even if there’s a live audience the sound techs would want it mic’d separately so they could dial it and “sweeten” it in post, and that any self-respecting audio engineer would want to put at least some of the laugh track on the back channels of a surround encoding. So that could be referenced to strip the audience out (the same way some karaoke machines strip vocals by removing the signals that are equal on both stereo channels). But I don't have ready means to determine whether my assumptions correspond to reality.