Form submission handler for config_test_delete_form().
function config_test_delete_form_submit($form, &$form_state) {
$form_state['config_test']
->delete();
drupal_set_message(format_string('%label configuration has been deleted.', array(
'%label' => $form_state['config_test']
->label(),
)));
$form_state['redirect'] = 'admin/structure/config_test';
}