Form for deleting a browser language negotiation mapping.
function language_negotiation_configure_browser_delete_form($form, &$form_state, $browser_langcode) {
$form_state['browser_langcode'] = $browser_langcode;
$question = t('Are you sure you want to delete %browser_langcode?', array(
'%browser_langcode' => $browser_langcode,
));
$path = 'admin/config/regional/language/detection/browser';
return confirm_form($form, $question, $path, '');
}