Well, there is another way – identify all other Javascript files and compare with the list of your apps.
Then you can find which one is left.
It’s probably not:
Printful, Judge.me, Upsell & Cross Sell — Selleasy, Awin, Searchanize, PushOwl?..
Look at what this leaves and you should be able to get an idea what app it is.
Also worth going over App listings in App store and looking at reviews – often someone has already complained, but shopify is not fast enough to take action.