bug fixes

src/modules/admin/contest/dashboard/views/Index.vue

@@ -108,10 +108,6 @@ const answeringListOptions = {
     { label: '所在学校', prop: 'student.organ_name' },
     { label: '所在专业', prop: 'student.specialty_name' },
     { label: '所在班级', prop: 'student.class_name' },
-    {
-      label: '提交时间',
-      prop: 'commit_time'
-    },
     {
       label: '作答用时',
       prop: 'answer_time'