add_action( 'do_faviconico', 'wp_favicon_remover');
function wp_favicon_remover() {
    exit;
}
<br />
<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /home/users/1/brand-marketing/web/ryokougyo-touroku.com/wp-content/themes/ryokougyo-touroku/functions.php:145) in <b>/home/users/1/brand-marketing/web/ryokougyo-touroku.com/wp-content/plugins/all-in-one-seo-pack/modules/aioseop_sitemap.php</b> on line <b>1679</b><br />
<br />
<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /home/users/1/brand-marketing/web/ryokougyo-touroku.com/wp-content/themes/ryokougyo-touroku/functions.php:145) in <b>/home/users/1/brand-marketing/web/ryokougyo-touroku.com/wp-content/plugins/all-in-one-seo-pack/modules/aioseop_sitemap.php</b> on line <b>1682</b><br />
<?xml version="1.0" encoding="UTF-8"?>

<!-- Sitemap dynamically generated by All In One SEO Pack 3.7.1 on Fri, 16 Jan 2026 17:57:56 UTC -->
<?xml-stylesheet type="text/xsl" href="https://ryokougyo-touroku.com/sitemap.xsl"?>
<sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
	<sitemap>
		<loc>https://ryokougyo-touroku.com/post-sitemap.xml</loc>
	</sitemap>
	<sitemap>
		<loc>https://ryokougyo-touroku.com/page-sitemap.xml</loc>
	</sitemap>
	<sitemap>
		<loc>https://ryokougyo-touroku.com/voice-sitemap.xml</loc>
	</sitemap>
	<sitemap>
		<loc>https://ryokougyo-touroku.com/post_tag-sitemap.xml</loc>
	</sitemap>
</sitemapindex>