They update it as required. The API page has changed twice recently as they keep changing the destinations they want the API in advance for.
Given that they are still selling both ex premium seats and 33" legroom for next summer, it would seem to be an absolutely ridiculous thing to be doing, if the website is in fact showing that they are removing them. If they do remove them, people already booked are going to have a field day if they are selling products they have openly stated that will not have. I doubt TC would be that stupid

Time will tell.