Update Module.php

[davidmintz]

it seems you no longer need to get the $auth from the service manager, since you're getting a $currentUser whether authenticated or not. Hence the proposed deletion of the line, since it may tend to confuse (it kind of confused me :-) ).

[slaff]

I should probably add also some information why the auth service is removed from the code.. Have to think about a change that does not require a change in the content of the book.