[Mailman-Users] .psv files in /var/spool/mailman/in 2.1.9

I found some .psv files in /var/spool/mailman/in/ (RHEL 5 Mailman package; 2.1.9). That seems to be too early for the stuff mentioned here (and I don't see those options in Defaults.py) https://mail.python.org/pipermail/mailman-users/2009-June/066395.html

Is it safe to remove old .psv files in this directory directly via find / cron?

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