完成重构数据库操作代码

web/src/components/session/OfflineSession.js

@@ -7,7 +7,6 @@ import {
     Layout,
     Modal,
     notification,
-    PageHeader,
     Row,
     Select,
     Space,
@@ -18,7 +17,7 @@ import {
 } from "antd";
 import qs from "qs";
 import request from "../../common/request";
-import {differTime, itemRender} from "../../utils/utils";
+import {differTime} from "../../utils/utils";
 import Playback from "./Playback";
 import {message} from "antd/es";
 import {DeleteOutlined, ExclamationCircleOutlined, SyncOutlined, UndoOutlined} from "@ant-design/icons";