A former Gloucester mail carrier accused of dealing OxyContin while on his route has had drug charges against him dismissed. Stephen Hale had originally pleaded guilty. But a judge dismissed charges of possession of a Class B substance and attempting to commit a crime because Hale had completed a drug rehabilitation program. He was one of four people arrested in a sting in August 2010 after agreeing to sell drugs to a confidential informant. Authorities said he was selling drugs along his route.