Remove sticky scroll to top of page button

Hello All, Can anybody help with where I can find a control to turn off the sticky button on the bottom right side of pages that quick scrolls to the top of the page? I recall there used to be a setting for this but I cannot find anything with the latest version. Here is a screenshot to show you exactly what I am talking about. https://www.dropbox.com/s/rtj3tn3khjudvpq/sticky%20button.png?dl=0

Thanks