A pass-through recipe is one which requires an item as input which is
carried through to the output (e.g., using a Golden Railway Ticket to
create a regular Railway Ticket in Railcraft). As these aren't really
recipes, they should not be listed as such in the item detail page.
This fixes a regression where recipes for vanilla Minecraft items
(e.g., Iron Ingot) added by mods (e.g., Pulverized Iron to Iron
Ingot) didn't show up on that item's detail page.