Removed extra usings from migrations

src/NzbDrone.Core/Datastore/Migration/048_add_title_to_scenemappings.cs

@@ -1,8 +1,4 @@
 using NzbDrone.Core.Datastore.Migration.Framework;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
 using FluentMigrator;
 
 namespace NzbDrone.Core.Datastore.Migration

src/NzbDrone.Core/Datastore/Migration/053_add_series_sorttitle.cs

@@ -1,12 +1,5 @@
-using System;
+using System.Data;
-using System.IO;
-using System.Data;
-using System.Linq;
-using System.Collections.Generic;
 using FluentMigrator;
-using Newtonsoft.Json;
-using NzbDrone.Common;
-using NzbDrone.Common.Serializer;
 using NzbDrone.Core.Datastore.Migration.Framework;
 
 namespace NzbDrone.Core.Datastore.Migration