remove postgres container

test/docker_mail/templates/docker-compose.yml

@@ -213,17 +213,6 @@ services:
       - MAILMAN_REST_USER=mailman
       - MAILMAN_REST_PASSWORD={{ mailman_restapi_pass }}
 
-  mailman-db:
-    container_name: mailman-db
-    image: postgres:11-alpine
-    restart: always
-    volumes:
-      - "{{ basedir }}/mailman-db:/var/lib/postgresql/data"
-    environment:
-      - POSTGRES_DB=mailmandb
-      - POSTGRES_USER=mailman
-      - POSTGRES_PASSWORD={{ mailman_db_pass }}
-
   mailman-db:
     image: mariadb:10.5
     command: --character-set-server=utf8mb4 --collation-server=utf8mb4_unicode_ci