- review suggestions

Co-authored-by: Millicent Achieng <[email protected]>

Author: baywet

src/Microsoft.OpenApi.Readers/V2/OpenApiOperationDeserializer.cs

@@ -3,7 +3,6 @@
 
 using System.Collections.Generic;
 using System.Linq;
-using System.Xml.Schema;
 using Microsoft.OpenApi.Any;
 using Microsoft.OpenApi.Extensions;
 using Microsoft.OpenApi.Models;