fix: unused usings

Author: maurei

test/JsonApiDotNetCoreExampleTests/Acceptance/Spec/ResourceTypeMismatchTests.cs

@@ -1,15 +1,8 @@
-using System.Collections.Generic;
-using System.Linq;
 using System.Net;
 using System.Threading.Tasks;
-using Bogus;
 using JsonApiDotNetCore.Serialization.Objects;
-using JsonApiDotNetCoreExample.Models;
-using JsonApiDotNetCoreExampleTests.Helpers.Models;
-using Microsoft.EntityFrameworkCore;
 using Newtonsoft.Json;
 using Xunit;
-using Person = JsonApiDotNetCoreExample.Models.Person;
 
 namespace JsonApiDotNetCoreExampleTests.Acceptance.Spec
 {