Remove authclean service from reinjecting port

Messages are already cleaned once on the submission port
to avoid leaking the user IP address.
There is no need to clean them again
and remove the `Received` header
which records reception from filtermail.

cmdeploy/src/cmdeploy/postfix/master.cf.j2

@@ -82,7 +82,6 @@ filter    unix -        n       n       -       -       lmtp
 localhost:{{ config.postfix_reinject_port }} inet  n       -       n       -       10      smtpd
   -o syslog_name=postfix/reinject
   -o smtpd_milters=unix:opendkim/opendkim.sock
-  -o cleanup_service_name=authclean
 
 # Cleanup `Received` headers for authenticated mail
 # to avoid leaking client IP.