fixes some usings

Emby.Server.Implementations/Library/DefaultPasswordResetProvider.cs

@@ -1,20 +1,15 @@
 using System;
-using System.Collections;
 using System.Collections.Generic;
 using System.Globalization;
 using System.IO;
+using System.Linq;
 using System.Threading.Tasks;
-using MediaBrowser.Common.Configuration;
 using MediaBrowser.Common.Extensions;
-using MediaBrowser.Controller;
 using MediaBrowser.Controller.Authentication;
 using MediaBrowser.Controller.Configuration;
-using MediaBrowser.Controller.Entities;
 using MediaBrowser.Controller.Library;
 using MediaBrowser.Model.Serialization;
 using MediaBrowser.Model.Users;
-using ServiceStack;
-using TvDbSharper.Dto;
 
 namespace Emby.Server.Implementations.Library
 {