protected function deleteUnassignedAbilities()
    {
        $query = $this->getUnassignedAbilitiesQuery();

        if (($count = $query->count()) > 0) {
            $query->delete();

            $this->info("Deleted {$count} unassigned ".Str::plural('ability', $count).'.');
        } else {
            $this->info('No unassigned abilities.');
        }
    }