delete_usermeta()

function delete_usermeta( $user_id, $meta_key, $meta_value = '' ) {
	_deprecated_function( __FUNCTION__, '3.0.0', 'delete_user_meta()' );
	global $gcdb;
	if ( !is_numeric( $user_id ) )
		return false;
	$meta_key = preg_replace('|[^a-z0-9_]|i', '', $meta_key);

	if ( is_array($meta_value) || is_object($meta_value) )
		$meta_value = serialize($meta_value);
	$meta_value = trim( $meta_value );

	$cur = $gcdb->get_row( $gcdb->prepare("SELECT * FROM $gcdb->usermeta WHERE user_id = %d AND meta_key = %s", $user_id, $meta_key) );

	if ( $cur && $cur->umeta_id )
		do_action( 'delete_usermeta', $cur->umeta_id, $user_id, $meta_key, $meta_value );

	if ( ! empty($meta_value) )
		$gcdb->query( $gcdb->prepare("DELETE FROM $gcdb->usermeta WHERE user_id = %d AND meta_key = %s AND meta_value = %s", $user_id, $meta_key, $meta_value) );
	else
		$gcdb->query( $gcdb->prepare("DELETE FROM $gcdb->usermeta WHERE user_id = %d AND meta_key = %s", $user_id, $meta_key) );

	clean_user_cache( $user_id );
	gc_cache_delete( $user_id, 'user_meta' );

	if ( $cur && $cur->umeta_id )
		do_action( 'deleted_usermeta', $cur->umeta_id, $user_id, $meta_key, $meta_value );

	return true;
}