Form submission handler.
array $form: An associative array containing the structure of the form.
array $form_state: An associative array containing the current state of the form.
Overrides FormInterface::submitForm
public function submitForm(array &$form, array &$form_state) {
system_date_format_delete($this->formatID);
drupal_set_message(t('Removed date format %format.', array(
'%format' => $this->format['name'],
)));
$form_state['redirect'] = 'admin/config/regional/date-time/formats';
}