There is no secret now. This post is about us making things clearer by stating what is canon (and therefore what is not). The document in question was never canon and therefore is part of the latter!But more seriously, if you have a secret that actually matters to the game, just tell people so they can use it to play the game. Otherwise you're valuing the ability to play "I know something you don't know" over actually making the game better.
(And if the secret doesn't actually matter to the game, well, then who gives a shit about it?)