aptから色々消えた

> apt (2.9.11) unstable; urgency=medium
>
> The ftp, rsh, and ssh methods have been removed. They have been unsupported
> and disabled since 1.8. Please, migrate to http(s) instead, or contribute
> an sftp method.
>
> If you need ad hoc access to a remote repository, you can usually run
> `python3 -m http.server` on that machine and use SSH port forwarding to
> run HTTP over SSH.