Clean up

src/Microsoft.AspNet.Server.Kestrel/Http/Connection.cs

@@ -3,7 +3,6 @@
 
 using System;
 using System.Threading;
-using System.Threading.Tasks;
 using Microsoft.AspNet.Server.Kestrel.Filter;
 using Microsoft.AspNet.Server.Kestrel.Infrastructure;
 using Microsoft.AspNet.Server.Kestrel.Networking;

src/Microsoft.AspNet.Server.Kestrel/Http/ConnectionContext.cs

@@ -22,7 +22,6 @@ namespace Microsoft.AspNet.Server.Kestrel.Http
 
         public SocketInput SocketInput { get; set; }
         public ISocketOutput SocketOutput { get; set; }
-
         public IConnectionControl ConnectionControl { get; set; }
     }
 }

src/Microsoft.AspNet.Server.Kestrel/Http/Listener.cs

@@ -1,9 +1,9 @@
 // Copyright (c) .NET Foundation. All rights reserved.
 // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 
-using Microsoft.AspNet.Server.Kestrel.Networking;
 using System;
 using System.Threading.Tasks;
+using Microsoft.AspNet.Server.Kestrel.Networking;
 using Microsoft.Extensions.Logging;
 
 namespace Microsoft.AspNet.Server.Kestrel.Http

src/Microsoft.AspNet.Server.Kestrel/Http/ListenerContext.cs

@@ -3,7 +3,6 @@
 
 using System;
 using System.Threading.Tasks;
-using Microsoft.AspNet.Server.Kestrel.Filter;
 using Microsoft.AspNet.Server.Kestrel.Infrastructure;
 
 namespace Microsoft.AspNet.Server.Kestrel.Http

src/Microsoft.AspNet.Server.Kestrel/Http/TcpListener.cs

@@ -1,8 +1,6 @@
 // Copyright (c) .NET Foundation. All rights reserved.
 // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 
-using System;
-using System.Net;
 using Microsoft.AspNet.Server.Kestrel.Infrastructure;
 using Microsoft.AspNet.Server.Kestrel.Networking;
 using Microsoft.Extensions.Logging;

src/Microsoft.AspNet.Server.Kestrel/Infrastructure/MemoryPoolBlock2.cs

@@ -66,7 +66,6 @@ namespace Microsoft.AspNet.Server.Kestrel.Infrastructure
         /// </summary>
         public int End { get; set; }
 
-
         /// <summary>
         /// Reference to the next block of data when the overall "active" bytes spans multiple blocks. At the point when the block is
         /// leased Next is guaranteed to be null. Start, End, and Next are used together in order to create a linked-list of discontiguous