code: def remove(self, user, status=None, symmetrical=False):
          
          if not status:
              status = RelationshipStatus.objects.following()
  
          res = Relationship.objects.filter(
              from_user=self.instance,
              to_user=user,
              status=status,
              site__pk=settings.SITE_ID
          ).delete()
  
          if symmetrical:
              return (res, user.relationships.remove(self.instance, status, False))
          else:
              return res
docs: Remove a relationship from one user to another, with the same caveats
          and behavior as adding a relationship.