Remove unused directives

Jellyfin.Server/Startup.cs

@@ -1,10 +1,4 @@
-using System.Diagnostics;
-using System.Net;
-using System.Net.Http;
-using System.Reflection;
-using Emby.Server.Implementations;
 using Jellyfin.Server.Extensions;
-using Jellyfin.Server.Implementations;
 using Jellyfin.Server.Middleware;
 using Jellyfin.Server.Models;
 using MediaBrowser.Common.Net;
@@ -14,7 +8,6 @@ using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Hosting;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Hosting;
-using Microsoft.Extensions.Http.Logging;
 using Prometheus;
 
 namespace Jellyfin.Server