New York Attorney General Eric Schneiderman on Tuesday ordered the nation’s two largest fantasy-sports-betting Web sites to cut off gamblers from the Empire State — saying the online operations are illegal and designed to scam sports fans out of billions of dollars. In cease-and-desist letters to FanDuel and DraftKings, Schneiderman’s office said the booming businesses were breaking New York’s law that prohibits gambling on games of chance. The letters say the companies’ customers “are clearly placing bets on events outside of their control or influence, specifically on the real-game performance of professional athletes.â€