Remove unnecessary log lines in Postfix's log (#5817) #528

Job	Run time
docker_image_builds (acme-mailcow)	1m 8s
docker_image_builds (clamd-mailcow)	57s
docker_image_builds (dockerapi-mailcow)	1m 4s
docker_image_builds (dovecot-mailcow)	1m 0s
docker_image_builds (netfilter-mailcow)	1m 0s
docker_image_builds (olefy-mailcow)	1m 12s
docker_image_builds (php-fpm-mailcow)	1m 23s
docker_image_builds (postfix-mailcow)	1m 15s
docker_image_builds (rspamd-mailcow)	1m 4s
docker_image_builds (sogo-mailcow)	1m 23s
docker_image_builds (solr-mailcow)	1m 13s
docker_image_builds (unbound-mailcow)	47s
docker_image_builds (watchdog-mailcow)	52s
	14m 18s

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