No crime was committed. Kicking him off the show would be discrimination.
For what? He's not gay (as he is sure to mention his girlfriend in the interview). Hmmmm, if sexual orientation is a protected class in the state in which he is an employee, he could not be fired for being gay. He could, however, likley be fired for participating in porn (gay or straight) or for any reason or no reason at all (assuming he is in an employment at will state.) I think. I'm not an employment lawyer.
Personally, I can't wait to see the drama (this is really out of character for me). It's one thing to mock a guy for perceived homosecuality (TOTALLY not cool). But for a guy who is straight to be kown to have participated in gay porn? Man, I'm thinking it's sort of PC-friendly(ish) opn season on this dude.