Delete not needed element from array in existing node plugin

Hey Jacob,
Here a full array:

$plugin = array(
  'title' => t('Node'),  // <- first one.
  'single' => TRUE,
  'defaults' => array(
    'nid' => '',
    'links' => TRUE,
    'leave_node_title' => FALSE,
    'identifier' => '',
    'build_mode' => 'teaser',
  ),
  'title' => t('Existing node'), // <- second one.
  'icon' => 'icon_node.png',
  'description' => t('Add a node from your site as content.'),
  'category' => t('Custom'),
  'top level' => TRUE,
  'js' => array('misc/autocomplete.js'),
);