remove broken postfix spamlists (spamhaus.org and abuseat.org)

roles/mailserver/templates/etc_postfix_main.cf.j2

@@ -112,8 +112,6 @@ smtpd_client_restrictions = permit_sasl_authenticated
 # Postscreen
 postscreen_access_list = permit_mynetworks
 postscreen_dnsbl_sites =
-  sbl-xbl.spamhaus.org*2
-  cbl.abuseat.org*2
   bl.spamcop.net*2
   dnsbl.sorbs.net*1
   spam.spamrats.com*2