remove menus, languages from drupal programmatically

gistfile1.php

if (conf_path() != 'sites/default') {
    $menus = array(
      'menu-main-menu-bg',
      'menu-main-menu-cs',
      'menu-main-menu-de',
      'menu-main-menu-fi',
      'menu-main-menu-hr',
      'menu-main-menu-hu',
      'menu-main-menu-pl',
      'menu-main-menu-ro',
      'menu-main-menu-ru',
      'menu-main-menu-sl',
      'menu-footer-menu-bg',
      'menu-footer-menu-cs',
      'menu-footer-menu-de',
      'menu-footer-menu-fi',
      'menu-footer-menu-hr',
      'menu-footer-menu-hu',
      'menu-footer-menu-pl',
      'menu-footer-menu-ro',
      'menu-footer-menu-ru',
      'menu-footer-menu-sl',
    );

    foreach ($menus as $menu_name) {
      $menu = menu_load($menu_name);

      if ($menu) {
        menu_delete($menu);
      }
    }
    $languages = language_list();
    $lang = array('bg','hr','cs','de','hu','pl','ro','ru','sl',);

    foreach($lang as $code) {
      if (isset($languages[$code])) {
        // Remove translations first.
        db_delete('locales_target')
          ->condition('language', $code)
          ->execute();
        cache_clear_all('locale:' . $code, 'cache');
        // With no translations, this removes existing JavaScript translations file.
        _locale_rebuild_js($code);
        // Remove the language.
        db_delete('languages')
          ->condition('language', $code)
          ->execute();
        db_update('node')
          ->fields(array('language' => ''))
          ->condition('language', $code)
          ->execute();
        if ($languages[$code]->enabled) {
          variable_set('language_count', variable_get('language_count', 1) - 1);
        }
        module_invoke_all('multilingual_settings_changed');
        $variables = array('%locale' => $languages[$code]->name);
        drupal_set_message(t('The language %locale has been removed.', $variables));
        watchdog('locale', 'The language %locale has been removed.', $variables);
      }
    }

    // Changing the language settings impacts the interface:
    cache_clear_all('*', 'cache_page', TRUE);

    // Set node language to site default.
    db_query("UPDATE {node} SET language=:lang", array(':lang' => language_default('language')));
  }