remove redundant mysql service

docker-compose.yml

@@ -128,18 +128,6 @@ services:
       traefik.http.routers.spigot_staging.priority: "100"
       traefik.http.services.spigot_staging.loadbalancer.server.port: "8100" # "8123"
 
-  mysql:
-    image: "mariadb:latest"
-    environment:
-      MYSQL_ROOT_PASSWORD: "9dgLQmjji2NNVQAp"
-    volumes:
-      - "mysql-data:/var/lib/mysql"
-      - "./mysql/cfg:/etc/mysql"
-      - "/etc/localtime:/etc/localtime:ro"
-    restart: always
-    networks:
-      - "minecraft"
-
   prometheus:
     image: "prom/prometheus:latest"
     command: "--web.enable-admin-api --config.file=/etc/prometheus/prometheus.yml"