remove unused namespaces.

src/Volo.Abp.Authorization/Volo/Abp/Authorization/Permissions/PermissionChecker.cs

@@ -3,7 +3,6 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Security.Claims;
 using System.Threading.Tasks;
-using JetBrains.Annotations;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Options;
 using Volo.Abp.DependencyInjection;

test/Volo.Abp.Permissions.Tests/Volo/Abp/Permissions/PermissionChecker_User_Tests.cs

@@ -1,12 +1,9 @@
 using System;
 using System.Security.Claims;
 using System.Threading.Tasks;
-using Microsoft.Extensions.DependencyInjection;
-using NSubstitute;
 using Shouldly;
 using Volo.Abp.Authorization.Permissions;
 using Volo.Abp.Security.Claims;
-using Volo.Abp.Session;
 using Xunit;
 
 namespace Volo.Abp.Permissions