Broken Header Link to a WP-JSON Directory causing excessive 404 Errors

These two urls are being inserted into the header of each page and they don’t exist. This in turn causes over eighty 404 errors on the site, and emails from Google. Here is the site:

http://www.californiadebtharassmentattorney.com

Here are the broken links:

http://www.californiadebtharassmentattorney.com/wp-json/oembed/1.0/embed?url=http%3A%2F%2Fwww.californiadebtharassmentattorney.com%2F&format=xml

http://www.californiadebtharassmentattorney.com/wp-json/oembed/1.0/embed?url=http%3A%2F%2Fwww.californiadebtharassmentattorney.com%2F

Here is the source code:

<link rel='https://api.w.org/' href='http://www.californiadebtharassmentattorney.com/wp-json/' /><link
rel="EditURI" type="application/rsd+xml" title="RSD" href="http://www.californiadebtharassmentattorney.com/xmlrpc.php?rsd" />
<link rel="wlwmanifest" type="application/wlwmanifest+xml" href="http://danheilbrun.01heartsinc.netdna-cdn.com/wp-includes/wlwmanifest.xml" /
>
<link rel='shortlink' href='http://www.californiadebtharassmentattorney.com/' />
<link
rel="alternate" type="application/json+oembed" href="http://www.californiadebtharassmentattorney.com/wp-json/oembed/1.0/embed?url=http%3A%2F%2Fwww.californiadebtharassmentattorney.com%2F" />
<link
rel="alternate" type="text/xml+oembed" href="http://www.californiadebtharassmentattorney.com/wp-json/oembed/1.0/embed?url=http%3A%2F%2Fwww.californiadebtharassmentattorney.com%2F&format=xml" />

I’ve deactivated plugins, performed a clean install, searched the database, gone through every setting, checked the CDN and the Hosting services,flushed permalinks, and more.!

I’m not using the WordPress REST API that I know of. How do I fix this? WHat is the root cause? It’s crucial that I get rid of the 404 errors however I really want to know what is causing it. Any ideas? Please help!!!