Respect Boost Union 'hidenodesprimarynavigation' setting.

config.php

@@ -186,6 +186,7 @@
 $THEME->iconsystem = \core\output\icon_system::FONTAWESOME;
 $THEME->haseditswitch = true;
 $THEME->usescourseindex = true;
+$THEME->removedprimarynavitems = explode(',', get_config('theme_boost_union', 'hidenodesprimarynavigation'));
 // By default, all Boost themes do not need their titles displayed.
 $THEME->activityheaderconfig = [
     'notitle' => true,