Remove useless/broken #theme statement from search_theme_form

modules/search.module

@@ -1034,9 +1034,6 @@ function search_box($form_id = 'search_theme_form') {
     '#default_value' => '',
     '#attributes' => array('title' => t('Enter the terms you wish to search for.')),
   );
-  if ($form_id == 'search_theme_form') {
-    $form['#theme']['theme_search_theme_form'] = array();
-  }
   $form['submit'] = array('#type' => 'submit', '#value' => t('Search'));
 
   return drupal_get_form($form_id, $form, 'search_box_form');