TD-3929-Controller refactor -DataService reference removed from the controller.

Author: Auldrin-Possa

DigitalLearningSolutions.Web/Controllers/TrackingSystem/Delegates/ActivityDelegatesController.cs

@@ -1,6 +1,5 @@
 namespace DigitalLearningSolutions.Web.Controllers.TrackingSystem.Delegates
 {
-    using DigitalLearningSolutions.Data.DataServices.UserDataService;
     using DigitalLearningSolutions.Data.Enums;
     using DigitalLearningSolutions.Data.Helpers;
     using DigitalLearningSolutions.Data.Models.CourseDelegates;