A bunch of cleanup for DI namespaces, ext methods and dist cache classes

src/Umbraco.PublishedCache.NuCache/DependencyInjection/UmbracoBuilderExtensions.cs

@@ -1,6 +1,5 @@
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.DependencyInjection.Extensions;
-using Umbraco.Core;
 using Umbraco.Core.DependencyInjection;
 using Umbraco.Core.Models;
 using Umbraco.Core.Scoping;