If your website is on the Business or Online Store plans on Avoori, you can access “Remove RSD Meta Tag” setting by going to your website admin > SEO > Advanced.
RSD is Really Simple Discovery, a publishing convention in XML format for making services discoverable. Enable “Remove Really Simple Discovery meta tag in source code” would remove such kind of tag
e.g <link rel=”EditURI” type=”application/rsd+xml” title=”RSD” href=”https://www.avoori.com/xmlrpc.php?rsd” />