Fix binding functions return types not always working

Upsilon/Binder/Binder.cs

@@ -365,10 +365,6 @@ namespace Upsilon.Binder
                     if (parent.Properties.TryGetValue(fullStopIndexExpression.Index.ToLowerInvariant(),
                         out var bDefProperty))
                     {
-                        var userData = bDefProperty.Type.UserData;
-                        if (string.IsNullOrEmpty(userData))
-                            return new VariableSymbol(fullStopIndexExpression.Index, Type.Unknown, true);
-
                         var boundDef = BoundTypeHandler.GetTypeDefinition(bDefProperty.Type.UserData ?? bDefProperty.ActualType);
                         if (boundDef != null)
                         {