tweak example

example/myapp/lib/MyApp.pm

@@ -1,16 +1,10 @@
 package MyApp;
 use Mojo::Base 'Mojolicious';
 
-# This method will run once at server start
 sub startup {
   my $self = shift;
-
   $self->plugin('tt_renderer');
-
-  # Router
   my $r = $self->routes;
-
-  # Normal route to controller
   $r->get('/')->to('example#welcome');
 }