do_action( 'delete_comment', string $comment_id, WP_Comment $comment )

1514	 * @since 1.2.01515	 * @since 4.9.0 Added the `$comment` parameter.1516	 *1517	 * @param string     $comment_id The comment ID as a numeric string.1518	 * @param WP_Comment $comment    The comment to be deleted.1519	 */1520	do_action( 'delete_comment', $comment->comment_ID, $comment );1521 1522	// Move children up a level.1523	$children = $wpdb->get_col( $wpdb->prepare( "SELECT comment_ID FROM $wpdb->comments WHERE comment_parent = %d", $comment->comment_ID ) );1524	if ( ! empty( $children ) ) {1525		$wpdb->update( $wpdb->comments, array( 'comment_parent' => $comment->comment_parent ), array( 'comment_parent' => $comment->comment_ID ) );1526		clean_comment_cache( $children );