Remove duplicate code

Duplication was introduced at merge c78e04645d.  Commit
ccc2526 (right-hand side of merge) moved this code from the bottom to
the middle.  Commit 21411b4 added a newline at the end of the file,
which made this a conflicted merge; the merge conflict was not resolved
properly.

Fixes #3208.

examples/todos/lib/router.js

@@ -61,8 +61,3 @@ Router.map(function() {
     }
   });
 });
-
-if (Meteor.isClient) {
-  Router.onBeforeAction('loading', {except: ['join', 'signin']});
-  Router.onBeforeAction('dataNotFound', {except: ['join', 'signin']});
-}