drop configuration test for federations in web application

lib/AccountManager/App.pm

@@ -113,18 +113,6 @@ sub new {
         );
     }
 
-    if (!$self->{configuration}->{groups}->{list}) {
-        $self->{logger}->fatal(
-            "No federations defined in configuration, aborting"
-        );
-        $self->respond(
-            template => 'errors.tt2.html',
-            data     => {
-                errors  => [ 'internal' ]
-            }
-        );
-    }
-
     if (!$self->{configuration}->{database}) {
         $self->{logger}->fatal(
             "No database defined in configuration, aborting"