book_remove_form_submit($form, &$form_state)
drupal/modules/book/book.pages.inc, line 207
Confirm form submit function to remove a node from the book.
@see book_remove_form()
function book_remove_form_submit($form, &$form_state) {
$node = $form['#node'];
if ($node->nid != $node->book['bid']) {
// Only allowed when this is not a book (top-level page).
menu_link_delete($node->book['mlid']);
db_delete('book')
->condition('nid', $node->nid)
->execute();
drupal_set_message(t('The post has been removed from the book.'));
}
$form_state['redirect'] = 'node/' . $node->nid;
}