Apply suggestions from code review

Co-authored-by: Mole <nikolajlauridsen@protonmail.ch>

src/Umbraco.Core/DependencyInjection/UmbracoBuilder.cs

@@ -26,8 +26,6 @@ using Umbraco.Cms.Core.IO;
 using Umbraco.Cms.Core.Logging;
 using Umbraco.Cms.Core.Mail;
 using Umbraco.Cms.Core.Manifest;
-using Umbraco.Cms.Core.Models;
-using Umbraco.Cms.Core.Models.Membership;
 using Umbraco.Cms.Core.Models.PublishedContent;
 using Umbraco.Cms.Core.Notifications;
 using Umbraco.Cms.Core.PropertyEditors;

src/Umbraco.Core/Services/UserDataService.cs

@@ -11,7 +11,7 @@ namespace Umbraco.Cms.Core.Services
 {
     public class UserDataService : IUserDataService
     {
-        private IUmbracoVersion _version;
+        private readonly IUmbracoVersion _version;
         private readonly ILocalizationService _localizationService;
         public UserDataService(IUmbracoVersion version, ILocalizationService localizationService)
         {

src/Umbraco.Tests.UnitTests/Umbraco.Core/Services/UserDataServiceTests.cs

@@ -17,11 +17,8 @@ namespace Umbraco.Cms.Tests.UnitTests.Umbraco.Core.Services
         private IUmbracoVersion _umbracoVersion;
         private ILocalizationService _localizationService;
 
-        [SetUp]
-        public void CreateMocks()
-        {
-            CreateUmbracoVersion(9, 0, 0);
-        }
+        [OneTimeSetUp]
+        public void CreateMocks() => CreateUmbracoVersion(9, 0, 0);
 
         [Test]
         [TestCase("en-US")]

src/Umbraco.Web.BackOffice/Controllers/CurrentUserController.cs

@@ -163,6 +163,7 @@ namespace Umbraco.Cms.Web.BackOffice.Controllers
             var userTours = JsonConvert.DeserializeObject<IEnumerable<UserTourStatus>>(_backofficeSecurityAccessor.BackOfficeSecurity.CurrentUser.TourData);
             return userTours;
         }
+
         public IEnumerable<UserData> GetUserData()
         {
             return _userDataService.GetUserData();