Remove RequiresPreviewFeatures

Author: Tratcher

src/Servers/Kestrel/Core/src/HttpProtocols.cs

@@ -1,9 +1,6 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
-using System;
-using System.Runtime.Versioning;
-
 namespace Microsoft.AspNetCore.Server.Kestrel.Core
 {
     /// <summary>
@@ -16,9 +13,7 @@ public enum HttpProtocols
         Http1 = 0x1,
         Http2 = 0x2,
         Http1AndHttp2 = Http1 | Http2,
-        [RequiresPreviewFeatures("Kestrel HTTP/3 support for .NET 6 is in preview.", Url = "https://aka.ms/aspnet/kestrel/http3reqs")]
         Http3 = 0x4,
-        [RequiresPreviewFeatures("Kestrel HTTP/3 support for .NET 6 is in preview.", Url = "https://aka.ms/aspnet/kestrel/http3reqs")]
         Http1AndHttp2AndHttp3 = Http1 | Http2 | Http3
     }
 }

src/Servers/Kestrel/Transport.Quic/src/Microsoft.AspNetCore.Server.Kestrel.Transport.Quic.csproj

@@ -10,8 +10,6 @@
     <NoWarn>CA1416;CS1591;CS0436;$(NoWarn)</NoWarn><!-- Conflicts between internal and public Quic APIs; Platform support warnings. -->
     <IsPackable>false</IsPackable>
     <Nullable>enable</Nullable>
-    <!-- Turn on preview features so we can use Quic -->
-    <EnablePreviewFeatures>True</EnablePreviewFeatures>
   </PropertyGroup>
 
   <ItemGroup>

src/Servers/Kestrel/Transport.Quic/src/QuicTransportOptions.cs

@@ -12,7 +12,6 @@ namespace Microsoft.AspNetCore.Server.Kestrel.Transport.Quic
     /// <summary>
     /// Options for Quic based connections.
     /// </summary>
-    [RequiresPreviewFeatures("Kestrel HTTP/3 support for .NET 6 is in preview.", Url = "https://aka.ms/aspnet/kestrel/http3reqs")]
     public class QuicTransportOptions
     {
         /// <summary>

src/Servers/Kestrel/Transport.Quic/src/WebHostBuilderQuicExtensions.cs

@@ -15,7 +15,6 @@ namespace Microsoft.AspNetCore.Hosting
     /// </summary>
     public static class WebHostBuilderQuicExtensions
     {
-        [RequiresPreviewFeatures("Kestrel HTTP/3 support for .NET 6 is in preview.", Url = "https://aka.ms/aspnet/kestrel/http3reqs")]
         public static IWebHostBuilder UseQuic(this IWebHostBuilder hostBuilder)
         {
             if (QuicImplementationProviders.Default.IsSupported)
@@ -29,7 +28,6 @@ public static IWebHostBuilder UseQuic(this IWebHostBuilder hostBuilder)
             return hostBuilder;
         }
 
-        [RequiresPreviewFeatures("Kestrel HTTP/3 support for .NET 6 is in preview.", Url = "https://aka.ms/aspnet/kestrel/http3reqs")]
         public static IWebHostBuilder UseQuic(this IWebHostBuilder hostBuilder, Action<QuicTransportOptions> configureOptions)
         {
             return hostBuilder.UseQuic().ConfigureServices(services =>