The Third Avenue outpost of Go Sushi has closed, leaving Murray Hillers lost, confused, and desperately seeking sashimi. Remain. Calm. We’re told the midtown restaurant is valiantly picking up slack and covering the shuttered outpost’s delivery area. A clerk at that location assures, “Delivery is still 25 to 30 minutes, unless it’s extremely far and the order is extremely large.” So, easy on the dragon boats.