How to remove macs from sharing

I have been using my personal iCloud account on my "work" mac which has allowed me to screen share or file share with my "home" macs when needed.

I am leaving my job and of course no longer want my personal macs be accessed by whoever will be working from my old work computer.

I have removed my iCloud account from my work computer, but the 2 "home" macs still continue to show up in the Shared list on the finder tab. Of course you cannot get into them unless you know the password, but I would like to completely remove them so they no longer show up at all. Think I tried everything I could think of.

Any suggestions?

Thanks!