Remove 'Help & Support' from the main Dashboard menu

We already have a 'Help & Support' item in the Sidebar, so no need to also have a 'Help' icon cluttering the main menu bar. As the 'Help & Support' item in the Sidebar is sub-divided into 3 different areas, if we have a 'Help' item in our main menu, then that item should also have a sub-menu with the same 3 areas, for consistency of UX. But it would be simpler to just remove the item from the menubar, as it is redundant - the one in the Sidebar is impossible to miss.