meaningless code, can be deleted

[zhenlei520]

Description

https://github.com/masastack/MASA.Docs/blob/main/src/Masa.Framework.Docs/wwwroot/pages/building-blocks/data-mapping/mapster/zh-CN.md#%E6%89%A9%E5%B1%95map

Expect

3. 使用映射

   public void Main()
   {
      var request = new
      {
          Name = "Teach you to learn Dapr ……",
          OrderItem = new OrderItem("Teach you to learn Dapr hand by hand", 49.9m)
      };
      var order = request.Map<Order>();// Map request to new object
   }