See also https://pagure.io/fedora-comps/pull-request/134

I'm OK with removing at:

• Because it's simply not that useful on a workstation
• Because it does represent a small, if mostly theoretical security hole as Colin says

But I don't think systemd-timers are a replacement for the intended usage of at - as a user or as root, quickly setting something up to run at a future time, even if you are logged out or have rebooted.

If someone is used to at, and uses it, say, to start a 3d-printing job overnight when electricity is cheaper, they probably just wantt at and don't want to figure out how to do it with systemd-timers. But they can layer at on the system.

systemd-timers are a much more compelling replacement for cron than they are for at.

I'm fine with this PR, but think it should be done in sync with updating comps - the ostree compose is not meant to be different in user-experience in non-essential ways. We can make this a brief item for the WG meeting next monday.

Merging since the comps change was committed.