I think they did pull it. Check out Slash Film, Vaughn talks about it.
I freaked out on them yesterday. I dont know where the hell that came from. I dont think its a Fox image. Its not a pre-approved image. When I found out, I said, what the f*** is this ****, and Fox is running around trying to figure out what happened as well. I agree. Its like a bad photoshop, which maybe it was by someone. It didnt reflect the movie. I was shocked when I saw it. I was like Jesus Christ.
And about the image with all the X-Men leaked some days ago, Matthew Vaughn said:
So that imagine isn't official?
SOURCE: http://www.slashfilm.com/exclusive-matthew-vaughn-reveals-magneto-professor-xmen-class/