Merge pull request #36 from hotungkhanh/kan-79/save-timetable-mods

fix(display ganttchart): CI/CD build fix

frontend/src/components/GanttChart.tsx

@@ -1,6 +1,6 @@
 import { memo, useEffect, useRef } from "react";
 import { Id } from "vis-data/declarations/data-interface";
-import { DataGroupCollectionType, DataItemCollectionType, DataSet, Timeline, TimelineItem } from "vis-timeline/standalone";
+import { DataGroupCollectionType, DataItemCollectionType, DataSet, Timeline } from "vis-timeline/standalone";
 import "vis-timeline/styles/vis-timeline-graph2d.min.css";
 import "../styles/ganttUnassignable.css";