fix: 授课时间格式化

src/views/report/Overvoew.vue

@@ -238,20 +238,6 @@
               }}</span>
             </a-tooltip>
           </template>
-          <template v-if="column.key === 'teachingTime'">
-            <a-tooltip placement="topRight">
-              <template #title>
-                <span>{{
-                  record.teachingTime &&
-                  dayjs(record.teachingTime).format("YYYY-MM-DD HH:mm:ss")
-                }}</span>
-              </template>
-              <span>{{
-                record.teachingTime &&
-                dayjs(record.teachingTime).format("YYYY-MM-DD HH:mm:ss")
-              }}</span>
-            </a-tooltip>
-          </template>
         </template>
       </a-table>
       <div class="tableBox">