refactor(采购订单发票): 移除发货总重表头的headerSlot配置

src/views/purchasingManage/purchaseOrder/invoice/components/inventoryTable.vue

@@ -684,7 +684,6 @@
             label: '发货总重',
             slot: 'sendTotalWeight',
             align: 'center',
-            headerSlot: 'headerTotalCount'
           },
           {
             width: 170,