Sorry, good catch. I meant to include the word "officially" in that sentence. Post has been updated to correct the mistake and clarify: the most likely reason why Flappy Bird was deleted is that he broke the rules, Apple found out, withheld his earnings, and forced him to take the game down.
In the article text: "In what surely is one of the strangest stories in years we are unlikely to ever really know what happened."
Well, okay then...