fix(测试跟踪): 缺陷管理级联自定义字段导入处理

--bug=1032255 --user=宋昌昌 【测试跟踪】缺陷管理-导入-不覆盖-选填字段不填写会导入失败 https://www.tapd.cn/55049933/s/1429202

test-track/backend/src/main/java/io/metersphere/excel/listener/IssueExcelListener.java

@@ -421,8 +421,7 @@ public class IssueExcelListener extends AnalysisEventListener<Map<Integer, Strin
                     BeanUtils.copyBean(customFieldItemDTO, customFieldDao);
                     if (StringUtils.isEmpty(v.toString())) {
                         if (StringUtils.equalsAnyIgnoreCase(type, CustomFieldType.MULTIPLE_MEMBER.getValue(),
-                                CustomFieldType.MULTIPLE_SELECT.getValue(), CustomFieldType.CHECKBOX.getValue(),
-                                CustomFieldType.CASCADING_SELECT.getValue())) {
+                                CustomFieldType.MULTIPLE_SELECT.getValue(), CustomFieldType.CHECKBOX.getValue())) {
                             customFieldItemDTO.setValue("[]");
                             customFieldResourceDTO.setValue("[]");
                         } else if (StringUtils.equalsAnyIgnoreCase(type, CustomFieldType.MULTIPLE_INPUT.getValue())) {