Can't find where this php code is located

I’m working on a website and I am getting a line of php code at the top of the site. I can’t seem to locate it to delete it. I’m hoping you might be able to help me with locating and deleting the code.

A designer who was working on the site added the code to allow shortcodes to be used in the widget area. I went in and removed the code from the function.php child theme but the code is still there. I’ve spent some time trying to find where it might be but with no luck.

It does show up on all the pages but is hidden by the menu. I am trying to create a donation landing page and I need the menu/header removed. When I do this the code is shown.

Website landing page:

Please let me know if you need any further information. I’ve also granted support access to the site if you need to gain access.

Thanks for all the help,