取消表格导出功能，修复回滚（删表）功能的painc (#1310)

* [feature]:取消表格导出功能

* 修复回滚（删表）painc的问题

* [feature]:修改初始化

server/service/system/sys_auto_code.go

@@ -403,9 +403,9 @@ func (autoCodeService *AutoCodeService) GetAllTplFile(pathName string, fileList
 
 func (autoCodeService *AutoCodeService) DropTable(BusinessDb, tableName string) error {
 	if BusinessDb != "" {
-		return global.GVA_DB.Exec("DROP TABLE " + tableName).Error
-	} else {
 		return global.MustGetGlobalDBByDBName(BusinessDb).Exec("DROP TABLE " + tableName).Error
+	} else {
+		return global.GVA_DB.Exec("DROP TABLE " + tableName).Error
 	}
 }