Clear Wordpress head removing meta tags, styles and scripts

clean-header.php

<?php
/*
 * Name: wordpress assist clean header
 * Source: https://gist.github.com/Auke1810/f2a4cf04f2c07c74a393a4b442f22267
 * Date: 2020-07-25
*/
      
remove_action('wp_head', 'rsd_link'); // remove really simple discovery link
remove_action('wp_head', 'wp_generator'); // remove wordpress version

remove_action('wp_head', 'feed_links', 2); // remove rss feed links (make sure you add them in yourself if youre using feedblitz or an rss service)
remove_action('wp_head', 'feed_links_extra', 3); // removes all extra rss feed links

remove_action('wp_head', 'index_rel_link'); // remove link to index page
remove_action('wp_head', 'wlwmanifest_link'); // remove wlwmanifest.xml (needed to support windows live writer)

remove_action('wp_head', 'start_post_rel_link', 10, 0); // remove random post link
remove_action('wp_head', 'parent_post_rel_link', 10, 0); // remove parent post link
remove_action('wp_head', 'adjacent_posts_rel_link', 10, 0); // remove the next and previous post links
remove_action('wp_head', 'adjacent_posts_rel_link_wp_head', 10, 0);
      
remove_action('wp_head', 'print_emoji_detection_script', 7);
remove_action('wp_print_styles', 'print_emoji_styles');
      
remove_action('wp_head', 'wp_shortlink_wp_head', 10, 0); // Remove shortlink

/*
 * Remove JSON API links in header html
 */
function remove_json_api()
{

    // Remove the REST API lines from the HTML Header
    remove_action('wp_head', 'rest_output_link_wp_head', 10);
    remove_action('wp_head', 'wp_oembed_add_discovery_links', 10);

    // Remove the REST API endpoint.
    remove_action('rest_api_init', 'wp_oembed_register_route');

    // Turn off oEmbed auto discovery.
    add_filter('embed_oembed_discover', '__return_false');

    // Don't filter oEmbed results.
    remove_filter('oembed_dataparse', 'wp_filter_oembed_result', 10);

    // Remove oEmbed discovery links.
    remove_action('wp_head', 'wp_oembed_add_discovery_links');

    // Remove oEmbed-specific JavaScript from the front-end and back-end.
    remove_action('wp_head', 'wp_oembed_add_host_js');

    // Remove all embeds rewrite rules.
    add_filter('rewrite_rules_array', 'disable_embeds_rewrites');
}
add_action('after_setup_theme', 'remove_json_api');

/*
    Snippet completely disable the REST API and shows {"code":"rest_disabled","message":"The REST API is disabled on this site."}
    when visiting http://yoursite.com/wp-json/
*/
function disable_json_api()
{

  // Filters for WP-API version 1.x
    add_filter('json_enabled', '__return_false');
    add_filter('json_jsonp_enabled', '__return_false');

    // Filters for WP-API version 2.x
    add_filter('rest_enabled', '__return_false');
    add_filter('rest_jsonp_enabled', '__return_false');
}
add_action('after_setup_theme', 'disable_json_api');

/*
 * Remove WP resources hints
 * Exemple: <link rel="dns-prefetch" href="//s.w.org" />
 */
// remove_action('wp_head', 'wp_resource_hints', 2);

/*
 * Remove WP defatult scripts
 */
function change_default_jquery()
{
    wp_dequeue_script('jquery');
    wp_deregister_script('jquery');
    wp_dequeue_style('wp-block-library');
}
// add_filter('wp_enqueue_scripts', 'change_default_jquery', PHP_INT_MAX);

/*
 * remove hello elementor style
 */
// add_action('hello_elementor_enqueue_style', '__return_false');
// add_action('hello_elementor_enqueue_theme_style', '__return_false');

// Remove Elementor Icons (Eicons)
function remove_default_stylesheet()
{
    wp_deregister_style('elementor-icons');
    wp_deregister_style('elementor-animations');
    wp_deregister_style('elementor-frontend');
}
// add_action('wp_enqueue_scripts', 'remove_default_stylesheet', 20);

// Remove Google Fonts
// add_filter('elementor/frontend/print_google_fonts', '__return_false');

// Remove Font Awesome
function remove_elementor_fa_icons()
{
    foreach ([ 'solid', 'regular', 'brands' ] as $style) {
        wp_deregister_style('elementor-icons-fa-' . $style);
    }
}
// add_action('elementor/frontend/after_register_styles', 'remove_elementor_fa_icons', 20);

how-to-use.md

On Wordpress active theme folder, append to functions.php the following code

include_once __DIR__ . DIRECTORY_SEPARATOR . 'clean-header.php';