HOLD (Freebird-v2): hide the marketing box on the recurly credit card form

this is meant for freebird-v2 only

related to these other freebird-v2 pull requests: https://github.com/GigaOM/go-local-subscriptions/pull/46, https://github.com/GigaOM/go-subscriptions/pull/27, https://github.com/GigaOM/gigaom/pull/5719, and https://github.com/GigaOM/gigaom-plugins/pull/3044

see https://github.com/GigaOM/legacy-pro/issues/4372 and https://github.com/GigaOM/legacy-pro/issues/4055