http: remove CurlCookie

Author: miya789

src/shared/Core.Tests/CurlCookieTests.cs

@@ -3,7 +3,6 @@
 using System.Net;
 using GitCredentialManager;
 using GitCredentialManager.Tests.Objects;
-using CurlCookie;
 using Xunit;
 
 namespace Core.Tests;