Remove head tags for facebook/meta pixel and google analytics

Hi

Some years ago I added the code for tracking with facebook/meta to the head section on my clients website. We don’t use them anymore, so I’d like to remove them.

I believe I edited a file through FTP or in a editor in the WordPress admin panels to add them, however I can’t seem to find a way to remove them again.*

I’ve found some guides pointing to checking my theme’s functions.php and header.php files, but the code is not in them. I’ve looked around for similar files in the wordpress install folders through FTP, but can’t seem to find it.

How do I edit the head tags to remove them, or which files should I check, where I could find it?

ps. I didn’t use a plugin to add them, so I don’t seem to be able to remove them by installing a “meta/head tags editor” plugin.

*1) I found one guide asking me to look for a “header/footer metatags” section in the theme editor, but there doesn’t seem to be one anymore.

2) I found another guide asking me to look for a “editor” tab in the “Apperance” menu, but it doesn’t seem to exist anymore. (I’m guessing it has been removed in later versions of wordpress for security reasons).

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