refactor(antd): 移除Popconfirm中已废弃的getVxePopupContainer属性

antd已支持滚动跟随，不再需要手动指定getVxePopupContainer属性。删除相关代码及工具函数，简化实现。

apps/web-antd/src/views/system/dept/index.vue

@@ -7,7 +7,7 @@ import type { Dept } from '#/api/system/dept/model';
 import { nextTick } from 'vue';
 
 import { Page, useVbenDrawer } from '@vben/common-ui';
-import { eachTree, getVxePopupContainer } from '@vben/utils';
+import { eachTree } from '@vben/utils';
 
 import { Popconfirm, Space } from 'antdv-next';
 
@@ -163,7 +163,6 @@ function setExpandOrCollapse(expand: boolean) {
             {{ $t('pages.common.add') }}
           </ghost-button>
           <Popconfirm
-            :get-popup-container="getVxePopupContainer"
             placement="left"
             title="确认删除？"
             @confirm="handleDelete(row)"