Duplicated DNS entries for new mail systems

I noticed that the new mail systems have DNS entries in the torproject.org forward zone dns/domains.git.

Those duplicate the existing entries generated from LDAP data and stored in /srv/dns.torproject.org/var/generated/torproject.org, on the primary DNS server, nevii.

There might be a specific reason for this, but otherwise, we should remove the duplicates from domains.git.

Thanks!