退货单组件优化：移除pricingWay字段及相关赋值逻辑

src/views/saleManage/saleOrder/returnGoods/components/addReturnGoodsDialog.vue

@@ -522,7 +522,6 @@
               sendNo: '',
               sendId: '',
               contactName,
-              pricingWay,
               contactId,
               entrustedCode: code,
               entrustedId: id,
@@ -659,7 +658,6 @@
             if (item.productCode == val.productCode) {
               item['singlePrice'] = val.singlePrice;
               item['clientCode'] = item.clientCode || val.customerMark;
-              item['pricingWay'] = val.pricingWay || 1;
               item['notaxSinglePrice'] = val.notaxSinglePrice;
               item['taxRate'] = val.taxRate;
               item['goodsLevel'] = val.goodsLevel;