I have an old cubase project and I deleted everything out but I can’t get rid of a group of channels showing in the mixer.
I don’t know what kind of channel they are, kind of like the main stereo out (because they have no in/out routing). I don’t see them in the main window even with EVERYTHING selected as visible (and not hidden in a folder).
These are the input buses you have set up in audio connections.
Presumably you won’t want to actually get rid of them but can use the channel type filter to hide input channels.
Sorry just re-reading your post. Maybe these are carried over from an older system and you don’t have those inputs in which case remove them in audio connections.