Remove REST API Link Tag from Head

<?php
/**
 * Strips the REST API advertisement from every front-end page.
 * The REST API itself continues to function normally — only its discovery
 * links are removed.
 */
remove_action( 'wp_head',           'rest_output_link_wp_head', 10 );
remove_action( 'template_redirect', 'rest_output_link_header',  11 );
remove_action( 'xmlrpc_rsd_apis',   'rest_output_rsd' );