Remove empty t('')

Please, remove the empty help from the module:

function rotor_help($section) {
  switch($section) {
    case 'node/add/rotor-item':
...
...
...
    case 'admin/settings/rotor':
      return t('');
  }
} 

This empty string is causes a lot of problems in the translations (in l10n_server module for example). Comment, or remove please.