Merge pull request #10994 from umbraco/v9/todo/removed_obsolete_SystemFilesClass

v9: Removed obsolete SystemFiles class

src/Umbraco.Core/IO/SystemFiles.cs

@@ -1,16 +0,0 @@
-using System.IO;
-using Umbraco.Cms.Core.Hosting;
-
-namespace Umbraco.Cms.Core.IO
-{
-    public class SystemFiles
-    {
-        public static string TinyMceConfig => Constants.SystemDirectories.Config + "/tinyMceConfig.config";
-
-        // TODO: Kill this off we don't have umbraco.config XML cache we now have NuCache
-        public static string GetContentCacheXml(IHostingEnvironment hostingEnvironment)
-        {
-            return Path.Combine(hostingEnvironment.LocalTempPath, "umbraco.config");
-        }
-    }
-}