fix

src/views/system/config-manage/device-manage/edit-device-dialog.vue

@@ -46,6 +46,7 @@
               value-type="time-stamp"
               enable-time-picker
               format="YYYY/MM/DD HH:mm"
+              :clearable=true
               :time-picker-props="{ format: 'HH:mm' }"
             />
           </t-form-item>