Deleting a role will remove the permissions that role provided from any users that were assigned that role.
- Click the gear icon on the right side of the Primary Navigation at the top of the screen.
- Select "Roles"
- Click on the tab of the module that contains the role you want to delete.
- Find the role you want to delete on the list of roles for that module.
- On the right side of the role, click the button with the trash can on it to delete the role.