fix: 删除未引入的formatDate

(cherry picked from commit a692674b24a4e9ad9133b5f8b7b27767c5f6ef7d)

src/views/mp/components/wx-material-select/main.vue

@@ -238,7 +238,6 @@ export default defineComponent({
       selectMaterialFun,
       getMaterialPageFun,
       getPage,
-      formatDate,
       queryParams,
       objDataRef,
       list,