Unbreak mailrelay config

compose.mailrelay.yml

@@ -4,13 +4,8 @@ version: "3.8"
 services:
   app:
     entrypoint: /docker-entrypoint.mailrelay.sh
-    secrets:
-      - smtp_password
     environment:
       - SMTP_HOST=${SMTP_HOST}
-      - SMTP_PORT=${SMTP_PORT:25}
-      - SMTP_AUTH=${SMTP_AUTH}
-      - SMTP_TLS=${SMTP_TLS}
       - MAIL_FROM=${MAIL_FROM}
     configs:
       - source: mstmp_conf
@@ -28,8 +23,3 @@ configs:
     name: ${STACK_NAME}_entrypoint_mailrelay_${ENTRYPOINT_MAILRELAY_CONF_VERSION}
     file: entrypoint.mailrelay.sh.tmpl
     template_driver: golang
-
-secrets:
-  smtp_password:
-    name: ${STACK_NAME}_smtp_password_${SECRET_SMTP_PASSWORD_VERSION}
-    external: true