How do I remove leftover app code after uninstalling?

Dear all,

I was searching for a product review app and was testing several ones. However one of them (EmbedSocial) left code remains in my shop code and I actually don’t know how to get rid of all.

For example I would like to delete following part in the red box. I dont know why but in this moment it is only visible when editing the theme but it is NOT visible when browsing on the live-page.

As you can see, the red box is part of the whole “product information part” in the theme-editor and I can’t specify or chose where it’s coming from.

Editor-view:

Real page:

It’s a really annoying problem.

Maybe someone can help.

Thanks in advance.

Best regards

You could contact the app developer for removal instructions! Barring that then it might be something I can assist with, feel free to DM if you’d like to go that route.