How to remove Sales and Risk Management work areas from the navigator?

Summary:

We want to remove the access to some users to Risk Management and Sales work areas

Content (required):

Hi, we would like to ask what's the privilege that makes the user access to these work areas. As you can see, our manager can access to Risk Management and Sales from the navigator (and from the home page tabs as well). If we try to remove them from the Personalize Springboard page we still can see them from the navigator, because the access to this work areas is granted anyway.

We made a customized employee role and a customized line manager role