fix: 移除desktop版本中不需要的SQL

core/core-backend/src/main/resources/db/desktop/V2.6__ddl.sql

@@ -5,10 +5,3 @@ update data_visualization_info set version = 2;
 ALTER TABLE `visualization_template`
     ADD COLUMN `version` int NULL DEFAULT 3 COMMENT '使用资源的版本';
 update visualization_template set version = 2;
-update
-    core_chart_view as a,
-    core_chart_view as b
-set
-    a.x_axis = b.x_axis_ext,
-    a.x_axis_ext = b.x_axis
-where a.id = b.id and a.type = 'table-pivot';