Probably don't want to throw an exeption in the DoubleCheck constructor. It'll never get called, but it would be sad if the server started sending things that crashed old clients

astrid/plugin-src/com/todoroo/astrid/actfm/sync/messages/DoubleCheck.java

@@ -6,7 +6,6 @@ public class DoubleCheck extends ServerToClientMessage {
 
     public DoubleCheck(JSONObject json) {
         super(json);
-        throw new RuntimeException("No constructor for DoubleCheck implemented"); //$NON-NLS-1$
     }
 
     @Override