New Post: Create IIS Website without child WebApp

I was also looking for that feature: install a website without virtual directory.
The last Oleg's answer helped a lot.
Since I have only one website and would like to remove all virtual dirs the following code snippet works just fine:

            project.WixSourceGenerated += doc =>
                doc.FindAll("WebVirtualDir")
                    .ForEach(x => x.Remove());