PDPs: automatically hide variant selector for single-option products

Currently, if a PDP template has variant selectors, they always display, even if a product the template is assigned to has no options – it simply shows a single option called “Default Title.” The only workaround is to create a “No variant” state, which requires manually selecting the products you’d like to hide it on.

Ideally, PDP templates would automatically hide variant selectors when a product has no options.