Internet providers cannot be held liable for the information they carry. That, according to a federal judge who has dismissed America Online as a defendant in a 30 (M) million dollar defamation suit. White House adviser Sidney Blumenthal sued A-O-L and gossip columnist Matt Drudge over a report last August accusing Blumenthal of spousal abuse. Drudge -- who's Website appears on A-O-L -- later retracte