remove unnessasory changes

Author: hardik-desai-nhs

tests/UnitTests/AuthClientCredentialsTests/AuthClientCredentialsTests.cs

@@ -1,13 +1,16 @@
 
 namespace NHS.CohortManager.Tests.UnitTests.JwtTokenServiceTests;
 
+using System.IdentityModel.Tokens.Jwt;
 using System.Numerics;
 using System.Security.Cryptography;
 using System.Text;
+using System.Text.Json;
 using System.Threading.Tasks;
 using Common;
 using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Options;
+using Microsoft.IdentityModel.Tokens;
 using Moq;
 using Moq.Protected;