fix: 删除 ua

xw-pages/reduce.html

@@ -253,7 +253,6 @@
             if (res.code == 200) {
               localStorage.setItem("lastid", self.goodInfo.product_id);
               this.orderId = res.data.order_number;
-              const ua = navigator.userAgent.toLowerCase();
               // 第一步：是否是微信环境 -> 公众号授权
               if (self.openId && navigator.userAgent.toLowerCase().indexOf('micromessenger') !== -1) {
                 this.publicCollection(res.data.order_number);