Custom Code Issue JS Download

I’ve downloaded my custom javascript for my website from a template and it’s 13000 lines why is this so large it has no real fancy elements?

My question is how can I only leave in the necessary code elements?

Here is my site Read-Only: LINK
(how to share your site Read-Only link)

The project JavaScript file includes all the functionality Webflow sites can use out-of-the-box. As soon as you start making changes you can potentially break your projects features and that would one on you.