Is there a way to remove Boards functionality from view?

I know I can remove Boards from the layout menu, but I don't see any way to remove Boards functionality from a user's access. If a user has access to edit requests, they can see an option to "add to Boards" and "add to Workstream" when editing a request. We are onboarding a new group and planning on Boards being phase 2 of the onboarding, so I would rather that the group didn't see Boards options now, but I haven't found a way to remove the Boards options. Am I missing something? Thanks