Submit handler to delete a vocabulary after confirmation.
taxonomy_vocabulary_confirm_delete()
function taxonomy_vocabulary_confirm_delete_submit($form, &$form_state) {
$form_state['taxonomy']['vocabulary']
->delete();
drupal_set_message(t('Deleted vocabulary %name.', array(
'%name' => $form_state['values']['name'],
)));
watchdog('taxonomy', 'Deleted vocabulary %name.', array(
'%name' => $form_state['values']['name'],
), WATCHDOG_NOTICE);
$form_state['redirect'] = 'admin/structure/taxonomy';
cache_invalidate_tags(array(
'content' => TRUE,
));
return;
}