Cleaned up using directive

src/Microsoft.AspNet.SignalR.Core/Messaging/Command.cs

@@ -1,7 +1,6 @@
 // Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.md in the project root for license information.
 
 using System;
-using System.Diagnostics.CodeAnalysis;
 
 namespace Microsoft.AspNet.SignalR.Messaging
 {

src/Microsoft.AspNet.SignalR.Core/Messaging/IMessageBus.cs

@@ -1,7 +1,6 @@
 // Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.md in the project root for license information.
 
 using System;
-using System.Collections.Generic;
 using System.Threading.Tasks;
 
 namespace Microsoft.AspNet.SignalR.Messaging

src/Microsoft.AspNet.SignalR.Core/Messaging/LocalEventKeyInfo.cs

@@ -1,7 +1,6 @@
 // Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.md in the project root for license information.
 
 using System;
-using System.Collections.Generic;
 
 namespace Microsoft.AspNet.SignalR.Messaging
 {

src/Microsoft.AspNet.SignalR.Core/Messaging/MessageBusExtensions.cs

@@ -2,8 +2,6 @@
 
 using System;
 using System.Collections.Generic;
-using System.Diagnostics.CodeAnalysis;
-using System.Threading;
 using System.Threading.Tasks;
 using Microsoft.AspNet.SignalR.Infrastructure;
 

src/Microsoft.AspNet.SignalR.Core/Messaging/MessageResult.cs

@@ -3,7 +3,6 @@
 using System;
 using System.Collections.Generic;
 using System.Diagnostics.CodeAnalysis;
-using System.Linq;
 
 namespace Microsoft.AspNet.SignalR.Messaging
 {

src/Microsoft.AspNet.SignalR.Core/Messaging/ScaleoutMappingStore.cs

@@ -3,7 +3,6 @@
 using System;
 using System.Collections;
 using System.Collections.Generic;
-using System.Diagnostics.CodeAnalysis;
 
 namespace Microsoft.AspNet.SignalR.Messaging
 {

src/Microsoft.AspNet.SignalR.Core/Messaging/ScaleoutMessage.cs

@@ -1,7 +1,6 @@
 using System;
 using System.Collections.Generic;
 using System.Diagnostics.CodeAnalysis;
-using System.Globalization;
 using System.IO;
 
 namespace Microsoft.AspNet.SignalR.Messaging

src/Microsoft.AspNet.SignalR.Core/Messaging/ScaleoutMessageBus.cs

@@ -1,7 +1,6 @@
 // Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.md in the project root for license information.
 
 using System;
-using System.Collections.Concurrent;
 using System.Collections.Generic;
 using System.Diagnostics;
 using System.Diagnostics.CodeAnalysis;

src/Microsoft.AspNet.SignalR.Core/Messaging/ScaleoutStore.cs

@@ -1,7 +1,6 @@
 using System;
 using System.Diagnostics.CodeAnalysis;
 using System.Threading;
-using Microsoft.AspNet.SignalR.Infrastructure;
 
 namespace Microsoft.AspNet.SignalR.Messaging
 {

src/Microsoft.AspNet.SignalR.Core/Messaging/ScaleoutStreamManager.cs

@@ -4,7 +4,6 @@ using System;
 using System.Collections.Generic;
 using System.Collections.ObjectModel;
 using System.Diagnostics;
-using System.Threading;
 using System.Threading.Tasks;
 using Microsoft.AspNet.SignalR.Infrastructure;
 

src/Microsoft.AspNet.SignalR.Core/Messaging/Subscription.cs

@@ -2,7 +2,6 @@
 
 using System;
 using System.Collections.Generic;
-using System.Diagnostics;
 using System.Diagnostics.CodeAnalysis;
 using System.IO;
 using System.Threading;

src/Microsoft.AspNet.SignalR.Core/Messaging/Volatile.cs

@@ -1,6 +1,5 @@
 // Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.md in the project root for license information.
 
-using System;
 using System.Threading;
 
 namespace Microsoft.AspNet.SignalR.Messaging