I've a taxonomy vocabulary and creting a custom field using the HS form API. My taxonomy structure like the following-

A
-B
--D
--E
-C
---F

I need to hide the root term when population the term and populated the field field starting from chield level.

The code to generate the field is-

$form['test']['#title'] = t('Category?');
      $form['test']['#type'] = 'hierarchical_select';
      $form['test']['#config'] = array(
      'module' => 'hs_taxonomy',
      'params' => array(
        'vid'                        => $vocabulary->vid,
        'exclude_tid'                => NULL,
        'root_term'                  => TRUE,
        'entity_count_for_node_type' => NULL,
      ),
      'enforce_deepest' => 0,
      'entity_count'    => 0,
      'require_entity'  => 0,
      'save_lineage'    => 0,
      'dropbox' => array(
      'status' => 1,
      'limit'  => 0,
    ),
    'editability' => array(
      'status' => 0,
    ),
    'render_flat_select' => 0,
    );

Can anyone help me.