Clean up head tag

// function.php
// Alter dns-prefetch links
add_filter('wp_resource_hints', function (array $urls, string $relation): array {
    // If the relation is different than dns-prefetch, leave the URLs intact
    if ($relation !== 'dns-prefetch') {
        return $urls;
    }
    // Remove s.w.org entry
    $urls = array_filter($urls, function (string $url): bool {
        return strpos($url, 's.w.org') === false;
    });
    return array_merge($urls);
}, 10, 2);

// Remove infos about WordPress version
remove_action('wp_head', 'wp_generator');

// Remove emoji script and styles
remove_action('wp_head', 'print_emoji_detection_script', 7);
remove_action('wp_print_styles', 'print_emoji_styles');

// Remove REST-API link
remove_action('wp_head', 'rest_output_link_wp_head');

// Disable XML-RPC
add_filter('xmlrpc_enabled', function (): bool {
    return false;
});

// Remove XML-RPC link
remove_action('wp_head', 'rsd_link');

// Remove Windows Live Writer manifest
remove_action('wp_head', 'wlwmanifest_link');

// Disable RSS feeds by redirecting their URLs to homepage
foreach (['do_feed_rss2', 'do_feed_rss2_comments'] as $feedAction) {
    add_action($feedAction, function (): void {
        // Redirect permanently to homepage
        wp_redirect(home_url(), 301);
        exit;
    }, 1);
}

// Remove the feed links
remove_action('wp_head', 'feed_links', 2);

// Remove unnecessary attributes from style tags
add_filter('style_loader_tag', function (string $tag, string $handle): string {
  // Remove ID attribute
  $tag = str_replace("id='${handle}-css'", '', $tag);
  // Change ' to " in attributes:
  $tag = str_replace('\'', '"', $tag);
  // Remove trailing slash
  $tag = str_replace(' />', '>', $tag);
  // Remove double spaces
  return str_replace('  ', '', $tag);
}, 10, 2);