Remove productCount from Paypal Shop Products

Just testing out the Paypal shop app on a client's site and I want to remove the productCount field from the edit form and database as it is not required (all products are made to order so will never have a stock level).

Is there any way I should be doing this 'properly' as I can't find any reference to it in the templates which is where I would expect it to be based on the setup throughout Perch so far and even though I can see where it is in other files I don't want to just remove it from those files and the database manually unless I have to.

Thanks :)