Override buildOptionsForm() so that only the relevant options are displayed to the user.
Overrides ArgumentPluginBase::buildOptionsForm
public function buildOptionsForm(&$form, &$form_state) {
parent::buildOptionsForm($form, $form_state);
$form['must_not_be'] = array(
'#type' => 'checkbox',
'#title' => t('Fail basic validation if any argument is given'),
'#default_value' => !empty($this->options['must_not_be']),
'#description' => t('By checking this field, you can use this to make sure views with more arguments than necessary fail validation.'),
'#fieldset' => 'more',
);
unset($form['exception']);
}