Clean wp_head

functions.php

//
// Limpa wp_head().
//
function wp_head_cleanup () {
    // Remove Discovery.
    remove_action('wp_head', 'rsd_link');

    // Remove Feed.
    remove_action('wp_head', 'feed_links', 2);
    remove_action('wp_head', 'feed_links_extra', 3);

    // Remove Postagens.
    remove_action('wp_head', 'start_post_rel_link', 10, 0);
    remove_action('wp_head', 'parent_post_rel_link', 10, 0);
    remove_action('wp_head', 'adjacent_posts_rel_link', 10, 0);
    remove_action('wp_head', 'adjacent_posts_rel_link_wp_head', 10, 0 );

    remove_action('wp_head', 'wp_shortlink_wp_head', 10, 0 );

    // Remove Emojis.
    remove_action( 'wp_head', 'print_emoji_detection_script', 7 );
    remove_action( 'admin_print_scripts', 'print_emoji_detection_script' );
    remove_action( 'wp_print_styles', 'print_emoji_styles' );
    remove_action( 'admin_print_styles', 'print_emoji_styles' );

    // Remove Canonical.
    remove_action('wp_head', 'rel_canonical');

    // Remove oEmbed.
    remove_action( 'wp_head', 'rest_output_link_wp_head', 10 );
    remove_action( 'wp_head', 'wp_oembed_add_discovery_links', 10 );
    remove_action( 'wp_head', 'wp_oembed_add_host_js' );

    // Remove Outros.
    remove_action('wp_head', 'index_rel_link');
    remove_action('wp_head', 'wlwmanifest_link');
    
    remove_action ('wp_head', 'wp_generator');
}

add_action( 'after_setup_theme', 'wp_head_cleanup' );