Stop requesting DMARC reports

Nobody reads these XML reports
and we know our DKIM is valid
when `cmdeploy dns` is happy.

cmdeploy/src/cmdeploy/chatmail.zone.f

@@ -7,7 +7,7 @@ _imap._tcp.{chatmail_domain}.        SRV 0 1 143 {chatmail_domain}.
 _imaps._tcp.{chatmail_domain}.       SRV 0 1 993 {chatmail_domain}.
 {chatmail_domain}.                   CAA 128 issue "letsencrypt.org;accounturi={acme_account_url}"
 {chatmail_domain}.                   TXT "v=spf1 a:{chatmail_domain} -all"
-_dmarc.{chatmail_domain}.            TXT "v=DMARC1;p=reject;rua=mailto:{email};ruf=mailto:{email};fo=1;adkim=s;aspf=s"
+_dmarc.{chatmail_domain}.            TXT "v=DMARC1;p=reject;adkim=s;aspf=s"
 _mta-sts.{chatmail_domain}.          TXT "v=STSv1; id={sts_id}"
 mta-sts.{chatmail_domain}.           CNAME {chatmail_domain}.
 www.{chatmail_domain}.               CNAME {chatmail_domain}.