Bug 29697: Remove GetHiddenItemnumbers

Bug 29697: Remove GetHiddenItemnumbers

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
JD amended patch:
-    my @items        = $biblio->items->filter_by_visible_in_opac({ patron => $logged_in_user })->unblessed;
-    foreach my $item (@items) {
+    my $items        = $biblio->items->filter_by_visible_in_opac({ patron => $logged_in_user })->unblessed;
+    foreach my $item (@$items) {

-    for my $itm (@items) {
+    for my $itm (@$items) {

-    $dat->{ITEM_RESULTS}   = \@items;
+    $dat->{ITEM_RESULTS}   = $items;

-        @items_to_show = Koha::Items->search( { itemnumbers => [ map { $_->{itemnumber} } @all_items ] } )
-                                    ->filter_by_visible_in_opac( { patron => $patron } );
+        @items_to_show = Koha::Items->search( { itemnumber => [ map { $_->{itemnumber} } @all_items ] } )
+                                    ->filter_by_visible_in_opac( { patron => $patron } )->as_list;

-            my @items_to_show = $items->filter_by_visible_in_opac({ opac => 1, patron => $patron });
+            my @items_to_show = $items->filter_by_visible_in_opac({ opac => 1, patron => $patron })->as_list;

Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>