Fulfilling hints by Andrew Patner and La Cieca in recent months, Gerard Mortier has withdrawn from New York City Opera. Mortier had set forth a remarkable plan for an all-twentieth-century opening season, but adequate funding failed to materialize, and Mortier walked out. What happens next for City Opera is anything but clear. Dark days may lie ahead for many artistic institutions; as Tim Mangan reported three days ago, Opera Pacific is shutting down, and, according to Mark Swed, the Pasadena Symphony is in trouble. This will hardly be the end of it. Sympathies to all those who are losing their jobs in difficult times.