How can I restore the original tracking script on my page?

Hey Team, I tried to add a free order tracking on my page, I followed this youtube video https://youtu.be/D8bAzaXKMGQ and I changed the original script track your order page and on also changed the shipping confirmation script to the following script he provided in the video https://docs.google.com/document/d/1u… . Now I want to get back the Shopify original script cause I decided to download parcel panel app but I still have the script info. can you help me get the old script and remove the one i added? my website is zisho.myshopify.com. thanks