separate DF SDK classes from DF worker classes

fix typo

remove TODOs

remove commented-out code

Author: davidmrdavid

src/Durable/Actions/ActionType.cs renamed to src/DurableSDK/Actions/ActionType.cs

@@ -43,10 +43,10 @@ protected override void EndProcessing()
         {
             var privateData = (Hashtable)MyInvocation.MyCommand.Module.PrivateData;
             var context = (OrchestrationContext)privateData[SetFunctionInvocationContextCommand.ContextKey];
-            var loadedFunctions = FunctionLoader.GetLoadedFunctions();
+            // var loadedFunctions = FunctionLoader.GetLoadedFunctions();
 
             var task = new ActivityInvocationTask(FunctionName, Input, RetryOptions);
-            ActivityInvocationTask.ValidateTask(task, loadedFunctions);
+            // ActivityInvocationTask.ValidateTask(task, loadedFunctions);
 
             _durableTaskHandler.StopAndInitiateDurableTaskOrReplay(
                 task, context, NoWait.IsPresent,