How can I remove sets installed by sysupgrade?

Thanks to the OpenBSD team for their awesome software!

I have been running an Openbsd router for a few years now, mostly
following current. Today I decided to try out sysupgrade rather than
going through the usual manual process. I've read up on it a few times
and it seemed pretty straightforward.

I ran it and found too late that it installed all the x*, Comp and Game
sets, which were not part of the original install. Unfortunately this
overfilled my /usr partition and I'm getting errors on boot.

Is there a simple way to uninstall these sets? I need the space but
would much rather not start over from scratch.

I did find an email (too late) on this list about how there is no way to
tell sysupgrade to just upgrade an existing system without adding
everything else too. As a grateful user of free software I would also
like to ask, is that an option that might find its way into the system
sometime?


Thanks,

Judah