remove unused method

Author: nasdan

front/src/pods/student/student.container.tsx

@@ -7,7 +7,6 @@ import {
 } from 'core';
 import { useLog } from 'core';
 import { StudentComponent } from './student.component';
-import { useWithRef } from 'common';
 import { getPreviousSessionContent } from 'common-app';
 import { useParams } from 'react-router-dom';