Bit too aggressive with the C# cleanup - adds back in HelpController but just with the method that is needed to load the videos in the help section

src/Umbraco.Web/Editors/HelpController.cs

@@ -0,0 +1,43 @@
+using Newtonsoft.Json;
+using System.Collections.Generic;
+using System.Net.Http;
+using System.Runtime.Serialization;
+using System.Threading.Tasks;
+
+namespace Umbraco.Web.Editors
+{
+    public class HelpController : UmbracoAuthorizedJsonController
+    {  
+        public async Task<List<HelpPage>> GetContextHelpForPage(string section, string tree, string baseUrl = "https://our.umbraco.org")
+        {
+            var url = string.Format(baseUrl + "/Umbraco/Documentation/Lessons/GetContextHelpDocs?sectionAlias={0}&treeAlias={1}", section, tree);
+            using (var web = new HttpClient())
+            {
+                //fetch dashboard json and parse to JObject
+                var json = await web.GetStringAsync(url);
+                var result = JsonConvert.DeserializeObject<List<HelpPage>>(json);
+                if (result != null)
+                    return result;
+
+                return new List<HelpPage>();
+            }
+        }
+    }
+
+    [DataContract(Name = "HelpPage")]
+    public class HelpPage
+    {
+        [DataMember(Name = "name")]
+        public string Name { get; set; }
+
+        [DataMember(Name = "description")]
+        public string Description { get; set; }
+
+        [DataMember(Name = "url")]
+        public string Url { get; set; }
+
+        [DataMember(Name = "type")]
+        public string Type { get; set; }
+
+    }
+}