HELP! Where is this Code in my Website

I am going to hopefully explain this as best as possible but bear with me. After investigating an issue on my site, I found code that led me to realize the code/functionality is related to PhotoSwipe. I like how it works but I can’t figure out WHERE it is coming from. I did not install the JS code and can’t track it down in my files.

Ideally, I would like to remove this code and install the plugin. If I don’t see the same issue, I’ll be good but if I do, I’ll investigate more from that angle. But right now, I just need to START and remove the code from where it is now. I have looked at everything I can think of but I’ve reached the end of the road that I’m finally asking for help to fix this issue.

Please let me know what questions I can answer or if/how you can help! Thank you in advance and I’m hopeful I can work this out!

The page I need help with: [log in to see the link]