Update src/Shared/CertificateGeneration/CertificateManager.cs

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: danegsta

src/Shared/CertificateGeneration/CertificateManager.cs

@@ -4,7 +4,6 @@
 using System.Diagnostics;
 using System.Diagnostics.CodeAnalysis;
 using System.Diagnostics.Tracing;
-using System.Formats.Asn1;
 using System.Linq;
 using System.Runtime.InteropServices;
 using System.Security.Cryptography;