Bug 21066: Update NewsChannels.t

Bug 21066: Update NewsChannels.t

Removing the weird '' => 1 from the hash too.
NOTE: The following line in the module seems to be useless:
    $data->{$data->{'lang'}} = 1 if defined $data->{lang};

Test plan:
Run t/db_dependent/NewsChannels.t
Run t/db_dependent/Koha/News.t

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>