fix: drop sys_menu while upgrade

database/upgrade/upg_sys_dept.sql

@@ -1,6 +1,5 @@
 SET FOREIGN_KEY_CHECKS=0;
 
-DROP TABLE IF EXISTS `sys_menu`;
 CREATE TABLE IF NOT EXISTS `sys_dept` (
   `dept_id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT '部门id',
   `parent_id` bigint(20) DEFAULT 0 COMMENT '父部门id 默认0',