Remove code string from Check Out for Infinite Options

[EventWandererCo]

Hi there! 

I have a shopify store, https://the-saltiest-dog.com.au/ and I'd like to remove the code string in the checkout that the Infinite Options App includes. Basically we use infinite options to add in upsells for select products. 

If anyone has any advice on how to update, it would be appreciated! 

Thanks!