A former Genovese crime family captain was reportedly decapitated by a truck as he crossed a Brooklyn street last week. Antonio Conigliaro, 86, was identified by the NYPD as the man hit and killed June 12. The New York Post reported Friday that he went by “Tony Cakes” and “Tony the Dessert Man” — and was a former acting capo for the infamous crime family. He was struck by a city Transportation Department truck, his lawyers and law-enforcement sources told the Post. “He spent his life looking over his shoulder but he forgot to look both ways before crossing the street,” a police source told the…