I have a couple of units which evidently have failed:
[palooka@f15 ~]$ systemctl list-units --all --no-pager|grep error
ip6tables.service error inactive dead ip6tables.service
livesys-late.service error inactive dead livesys-late.service
ip6tables is not installed, and livesys-late is, I know, a remnant of having installed from a Live CD.
So as far as I can see, all I need do is to "remove" these somehow from systemd's purview.
How do I go about doing that, please?