Apple still hasn't denied or even commented on the matter, even though it could play a very significant role on future potential antitrust cases against Apple. Also, it's worth noting that Apple has a long and rich history of public campaigns against many of those "conspiracy theories" and this USB-C case is a rare exception.
Apple doesn't need to issue a denial for every conspiracy theory that rolls around. The fact that people are still bringing up a mere rumor as if it's true definitely lends credence to this being nothing more than a conspiracy theory.
