rblist__remove_node
rblist__remove_node(&ilist->rblist, &node->rb_node);
rblist__remove_node(&groups, node);
rblist__remove_node(rblist, pos);
void rblist__remove_node(struct rblist *rblist, struct rb_node *rb_node);
rblist__remove_node(&slist->rblist, &snode->rb_node);