Fix build

Author: JamesNK

src/Servers/Kestrel/Core/src/Internal/Http/Http1OutputProducer.cs

@@ -6,7 +6,6 @@
 using System.IO.Pipelines;
 using Microsoft.AspNetCore.Connections;
 using Microsoft.AspNetCore.Connections.Features;
-using Microsoft.AspNetCore.Http;
 using Microsoft.AspNetCore.Internal;
 using Microsoft.AspNetCore.Server.Kestrel.Core.Features;
 using Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Infrastructure;

src/Servers/Kestrel/Core/src/Internal/Http2/Http2Connection.cs

@@ -18,7 +18,6 @@
 using Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http2.FlowControl;
 using Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Infrastructure;
 using Microsoft.Extensions.Logging;
-using Microsoft.AspNetCore.Http;
 
 namespace Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http2;
 

src/Servers/Kestrel/Core/src/Internal/Http3/Http3Connection.cs

@@ -8,7 +8,6 @@
 using Microsoft.AspNetCore.Connections;
 using Microsoft.AspNetCore.Connections.Features;
 using Microsoft.AspNetCore.Hosting.Server;
-using Microsoft.AspNetCore.Http;
 using Microsoft.AspNetCore.Http.Features;
 using Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http;
 using Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Infrastructure;

src/Servers/Kestrel/Core/src/Middleware/HttpsConnectionMiddleware.cs

@@ -11,7 +11,6 @@
 using System.Security.Cryptography.X509Certificates;
 using Microsoft.AspNetCore.Connections;
 using Microsoft.AspNetCore.Connections.Features;
-using Microsoft.AspNetCore.Http;
 using Microsoft.AspNetCore.Http.Features;
 using Microsoft.AspNetCore.Internal;
 using Microsoft.AspNetCore.Server.Kestrel.Core;