(responding to Ed)
rm /var/lib/dnf/system-upgrade deletes the link.
FWIW, as noted by Samuel, removing packages won't buy you much.
I was taught to get the advice of 2 or 3 wise friends where practical;
it's in the Bible somewhere (I wish I could remember where!). So you
and Samuel agreeing gives me much more confidence. Likewise when Samuel
and Terry agreed on a key step last week. So regarding "FYIW": it's
worth a lot to me!
For example, if you use the akmod package for nVidia drivers
they are automatically rebuilt on each new kernel. But the
directory where the rpm's are kept (/var/cache/akmods/nvidia)
isn't clean up and will grow with time
I just looked; you're right. Several minutes ago, I opened a new thread
for the '/' filsystem problem. I'll continue this there.