Russell Crowe yesterday was forced to deny he was dead following bogus reports he had plunged off a mountain while filming in Austria. A rep for the “Robin Hood” star said the rumor that he had fallen more than 50 feet to his death in the mountains near Kitzbuhel at 4:30 a.m. yesterday were “not true.” The poppycock, started by a fake news Web site, spread like wildfire and was reported by New York radio station Z100.