Remove a 'woo commerce' legacy item from showing up during checkout

Please note, since this is our production website YOU WILL NOT HAVE ACCESS TO IT DIRECTLY. You will be instructing us on what file to edit to remove the item pictured. Woo-Commerce had legacy shipping options. These options you could have something like Flat Rate and price. Woo Commerce has moved passed this system in last major update and we finally decided to give it the boot. Everything works fine, BUT the 'Flat Rate' still shows up in cart and it is equivalent to giving customers free shipping. What customers see when they checkout is Flat Rate with no price next to it, and then then other shipping prices. Of course most pick the Flat Rate now since it seems to be free shipping. We want this gone ASAP. Thank you