code review：优化收银台的实现，解决 TODO

src/utils/constants.ts

@@ -177,80 +177,6 @@ export const PayOrderStatusEnum = {
   }
 }
 
-/**
- * 支付订单回调状态枚举
- */
-export const PayOrderNotifyStatusEnum = {
-  NO: {
-    status: 0,
-    name: '未通知'
-  },
-  SUCCESS: {
-    status: 10,
-    name: '通知成功'
-  },
-  FAILURE: {
-    status: 20,
-    name: '通知失败'
-  }
-}
-
-/**
- * 支付订单退款状态枚举
- */
-export const PayOrderRefundStatusEnum = {
-  NO: {
-    status: 0,
-    name: '未退款'
-  },
-  SOME: {
-    status: 10,
-    name: '部分退款'
-  },
-  ALL: {
-    status: 20,
-    name: '全部退款'
-  }
-}
-
-/**
- * 支付退款订单状态枚举
- */
-export const PayRefundStatusEnum = {
-  CREATE: {
-    status: 0,
-    name: '退款订单生成'
-  },
-  SUCCESS: {
-    status: 1,
-    name: '退款成功'
-  },
-  FAILURE: {
-    status: 2,
-    name: '退款失败'
-  },
-  PROCESSING_NOTIFY: {
-    status: 3,
-    name: '退款中，渠道通知结果'
-  },
-  PROCESSING_QUERY: {
-    status: 4,
-    name: '退款中，系统查询结果'
-  },
-  UNKNOWN_RETRY: {
-    status: 5,
-    name: '状态未知，请重试'
-  },
-  UNKNOWN_QUERY: {
-    status: 6,
-    name: '状态未知，系统查询结果'
-  },
-  CLOSE: {
-    status: 99,
-    name: '退款关闭'
-  }
-}
-
 /**
  * 商品 SPU 状态
  */