Code cleanup.

Source/MQTTnet/Internal/TestMqttChannel.cs

@@ -1,57 +0,0 @@
-// Licensed to the .NET Foundation under one or more agreements.
-// The .NET Foundation licenses this file to you under the MIT license.
-// See the LICENSE file in the project root for more information.
-
-using System.IO;
-using System.Security.Cryptography.X509Certificates;
-using System.Threading;
-using System.Threading.Tasks;
-using MQTTnet.Channel;
-
-namespace MQTTnet.Internal
-{
-    public sealed class TestMqttChannel : IMqttChannel
-    {
-        readonly MemoryStream _stream;
-
-        public TestMqttChannel(MemoryStream stream)
-        {
-            _stream = stream;
-        }
-
-        public TestMqttChannel(byte[] buffer)
-        {
-            _stream = new MemoryStream(buffer);
-        }
-
-        public string Endpoint { get; } = "<Test channel>";
-
-        public bool IsSecureConnection { get; } = false;
-
-        public X509Certificate2 ClientCertificate { get; }
-
-        public Task ConnectAsync(CancellationToken cancellationToken)
-        {
-            return Task.FromResult(0);
-        }
-
-        public Task DisconnectAsync(CancellationToken cancellationToken)
-        {
-            return Task.FromResult(0);
-        }
-
-        public Task<int> ReadAsync(byte[] buffer, int offset, int count, CancellationToken cancellationToken)
-        {
-            return _stream.ReadAsync(buffer, offset, count, cancellationToken);
-        }
-
-        public Task WriteAsync(byte[] buffer, int offset, int count, CancellationToken cancellationToken)
-        {
-            return _stream.WriteAsync(buffer, offset, count, cancellationToken);
-        }
-
-        public void Dispose()
-        {
-        }
-    }
-}