Remove and sort using

Author: dingmeng-xue

src/Common/AzurePSCmdlet.cs

@@ -15,20 +15,18 @@
 using Microsoft.ApplicationInsights;
 using Microsoft.Azure.Commands.Common.Authentication;
 using Microsoft.Azure.Commands.Common.Authentication.Abstractions;
-using Microsoft.WindowsAzure.Commands.Common.CustomAttributes;
 using Microsoft.Azure.ServiceManagement.Common.Models;
 using Microsoft.WindowsAzure.Commands.Common;
-using Microsoft.WindowsAzure.Commands.Utilities.Common;
+using Microsoft.WindowsAzure.Commands.Common.CustomAttributes;
 using System;
 using System.Collections.Concurrent;
+using System.Collections.ObjectModel;
 using System.Diagnostics;
 using System.IO;
 using System.Linq;
 using System.Management.Automation;
-using System.Text;
-using System.Collections.Generic;
 using System.Management.Automation.Runspaces;
-using System.Collections.ObjectModel;
+using System.Text;
 
 namespace Microsoft.WindowsAzure.Commands.Utilities.Common
 {