The body of a 42-year-old man was found Thursday afternoon in the Garret Mountain Reservation in Passaic County, investigators said. The man’s body was found by members of the Passaic County Sheriff’s Office around 1 p.m., officials said. His identity was not released by the Passaic County Prosecutor’s Office, which is investigating the discovery. The office said no suspects are being sought and that there is no danger to the public. His car also found in the area of the reservation, which is a 568-acre park located on First Watchung Mountain in Paterson and Woodland Park in southern Passaic C…