I'm not sure if you can turn that section on or off using Tableau Server.
You could try adding ?:embed=yes to the end of every link you share... I'm not sure there's a way to force that, but definitely de-clutters the view by removing the Tableau Server Header, Navigation, Comments and Tags sections.
While on that subject, here is a list of other URL parameters you can utilize in the url string (after the "?")
Thanks Mark - yes that does work !