Remove duplicated logic

The duplicated logic was nessessary because the before.insert hook was
not called before validation, when inserting was initiated on the server.
Using autoValues fixed this problem.

models/users.js

@@ -404,13 +404,6 @@ if (Meteor.isServer) {
           title,
           boardId,
           userId: ExampleBoard.userId,
-
-          // XXX Not certain this is a bug, but we except these fields get
-          // inserted by the Lists.before.insert collection-hook. Since this
-          // hook is not called in this case, we have to dublicate the logic and
-          // set them here.
-          archived: false,
-          createdAt: new Date(),
         };
 
         Lists.insert(list);