bug#28664: Old narinfos of tarballs purged on berlin

[Ludovic Courtès]

Hello there,

As a followup to <https://bugs.gnu.org/28664>, Ricardo upgraded to the
latest Guix on berlin, and I’ve now removed old .narinfos corresponding
to tarballs for which we potentially lacked the corresponding nar:

  sudo find /var/cache/guix/publish/none -mtime +7 -exec rm -v {} \;

There’s caching in nginx and on the user’s machines, so for a while we
might still get 200 for the narinfo and 404 for the corresponding nar,
but that will become consistent over time.

Apparently hydra.gnu.org is largely unaffected, presumably because we
GC’d less aggressively or have more GC roots.

Ludo’.