its not something the Theme would add. You would have to add it. Do you have any Hook Elements in Appearance > Elements ? As that would be the first place to check. Let me know.
No hook elements – Thought the same thing and also checked the header file.
I realize the theme didn’t add it was just hoping you might be able to help me find where they hid it. Have a feeling it is leftover code from Site Kit by Google.
If its not in a Hook, or a PHP Snippet or the header.php template and theres no plugins then yeah Site Kit could be to blame. Seen others with similar issues where code has been left behind. Any page caching plugins or on the server that may need clearing ?