removed default root property

tweaked the ui on add new show

NzbDrone.Core/Repository/RootDir.cs

@@ -8,11 +8,8 @@ namespace NzbDrone.Core.Repository
 {
     public class RootDir
     {
-        [SubSonicPrimaryKey(true)]
-        public int RootDirId { get; set; }
+        public int Id { get; set; }
 
         public string Path { get; set; }
-
-        public bool Default { get; set; }
     }
 }