修改期望时间为必填项

src/views/mobi.vue

@@ -107,6 +107,8 @@
                 placeholder="请选择"
                 @click="showDueTimePicker = true"
                 :rules="[{ required: true, message: '请至少选择一项！' }]"
+                required
+                clearable
                 label-width='8em'
             />
             <van-popup v-model="showDueTimePicker" position="bottom">
@@ -155,7 +157,6 @@ export default {
   mounted() {
   },
   methods: {
-    onConfirm() {},
     onSubmit() {
       this.$ajax.post({
         url: this.$api.POST_RESERVATION_FORM,