Cleanup

src/Umbraco.Core/HealthChecks/Checks/Security/BaseHttpHeaderCheck.cs

@@ -10,7 +10,6 @@ using System.Text.RegularExpressions;
 using System.Threading.Tasks;
 using Umbraco.Core.Hosting;
 using Umbraco.Core.Services;
-using Umbraco.Web;
 
 namespace Umbraco.Core.HealthChecks.Checks.Security
 {

src/Umbraco.Infrastructure/HostedServices/KeepAlive.cs

@@ -11,7 +11,6 @@ using Umbraco.Core.Configuration.Models;
 using Umbraco.Core.Hosting;
 using Umbraco.Core.Logging;
 using Umbraco.Core.Sync;
-using Umbraco.Web;
 
 namespace Umbraco.Infrastructure.HostedServices
 {

src/Umbraco.Tests.UnitTests/Umbraco.Infrastructure/HostedServices/KeepAliveTests.cs

@@ -18,7 +18,6 @@ using Umbraco.Core.Logging;
 using Umbraco.Core.Scoping;
 using Umbraco.Core.Sync;
 using Umbraco.Infrastructure.HostedServices;
-using Umbraco.Web;
 
 namespace Umbraco.Tests.UnitTests.Umbraco.Infrastructure.HostedServices
 {

src/Umbraco.Web.Common/AspNetCore/AspNetCoreHostingEnvironment.cs

@@ -142,7 +142,7 @@ namespace Umbraco.Web.Common.AspNetCore
             // (this is a simplified version of what was in 7.x)
             // note: should this be optional? is it expensive?
 
-            if (currentApplicationUrl == null)
+            if (currentApplicationUrl is null)
             {
                 return;
             }
@@ -152,7 +152,7 @@ namespace Umbraco.Web.Common.AspNetCore
                 return;
             }
 
-            var change = currentApplicationUrl != null && !_applicationUrls.Contains(currentApplicationUrl);
+            var change = !_applicationUrls.Contains(currentApplicationUrl);
             if (change)
             {
                 _applicationUrls.Add(currentApplicationUrl);