Del auto backup in Commands.md

docs/tech/Commands-for-Server-Operation-and-Maintenance.md

@@ -268,15 +268,6 @@ sudo docker system prune -f
 sudo systemctl restart traefik
 ```
 
-## 配置自动备份 (可选)
-
-``` bash
-(
-  crontab -u $(whoami) -l
-  echo "0 6 * * * /root/maria/script/backup.sh"
-) | crontab -u $(whoami) -
-```
-
 ## Linux 内核网络栈调优 (可选)
 
 编辑 `/etc/sysctl.conf`，在末尾添加以下内容：