修复更新菜单取消父级出现2个父类ID问题

src/main/java/cn/hnthyy/thmz/mapper/thmz/MenuMapper.java

@@ -103,9 +103,6 @@ public interface MenuMapper {
             "<when test='parentId!=null'>",
             ",parent_id =#{parentId,jdbcType=BIGINT}",
             "</when>",
-            "<when test='parentId!=null and parentId==-1 '>",
-            ",parent_id =null",
-            "</when>",
             "<when test='classCode!=null'>",
             ",class_code =#{classCode,jdbcType=VARCHAR}",
             "</when>",