code: def remove_manager(self, manager):
          
          select_action = 'remove_manager'
  
          self._update_scope_project_team(select_action=select_action, user=manager, user_type='manager')
docs: Remove a single manager to the scope.
  
          :param manager: single username to be added to the scope list of managers
          :type manager: basestring
          :raises APIError: when unable to update the scope manager