Implements hook_hook_info().
function system_hook_info() {
$hooks['token_info'] = array(
'group' => 'tokens',
);
$hooks['token_info_alter'] = array(
'group' => 'tokens',
);
$hooks['tokens'] = array(
'group' => 'tokens',
);
$hooks['tokens_alter'] = array(
'group' => 'tokens',
);
return $hooks;
}