@Override
    public PageService<SelectorQueryCondition, SelectorVO> pageService() {
        return selectorService;
    }
delete Selectors.

@param batchNamespaceCommonDTO batchNamespaceCommonDTO.
@return {@linkplain ShenyuAdminResult}
shenyu-admin/src/main/java/org/apache/shenyu/admin/controller/SelectorController.java