I'm Lizzy, from support team at Shopify.
To remove the social media share buttons in Debut, you don't need to edit the code at all! The option to remove them will appear directly in your theme editor.
To get there you can go to Online Store>Themes>Customize(on the theme you're editing). Once in the customizer you can switch to the product page options by clicking on the drop down in the top bar. From here, you will want to click on the "Product Pages section" where you will see the options below.
Unchecking "Show social sharing options" will remove them from your product pages. I made a short video to show the steps for getting to this point in Debut in the theme editor. You can watch it here.
Please let me know if you have any other questions about what I've said. You can give us a call too or start a live chat at any time.