Source

File: wp-includes/user.php

function wp_get_user_contact_methods( $user = null ) {
	$methods = array();
	if ( get_site_option( 'initial_db_version' ) < 23588 ) {
		$methods = array(
			'aim'    => __( 'AIM' ),
			'yim'    => __( 'Yahoo IM' ),
			'jabber' => __( 'Jabber / Google Talk' ),
		);
	}

	/**
	 * Filters the user contact methods.
	 *
	 * @since 2.9.0
	 *
	 * @param string[] $methods Array of contact method labels keyed by contact method.
	 * @param WP_User  $user    WP_User object.
	 */
	return apply_filters( 'user_contactmethods', $methods, $user );
}