By default, the following tag shows up in every WordPress install.
<link rel="EditURI" type="application/rsd+xml" title="RSD" href="https://yourdomain.com/xmlrpc.php?rsd" />
The above link is used by blog clients. If you edit your site from your browser then you don’t need this. It is also used by some 3rd party applications that utilize XML-RPC requests. In most cases, this is just unnecessary code.
Remove RSD link
Follow the steps below to remove the RSD link.
Click into the Perfmatters plugin settings.
Make sure you’re on the “General” tab.
Under the “Options” section, toggle on “Remove RSD Link.”
Scroll down and click “Save Changes.”