Remove Pages programatically

/**
 * Remove obsolete pages.
 */
function YOURMODULE_update_7001() {
  module_load_include('inc', 'page_manager', 'plugins/tasks/page');
  $pages = array(
    'PAGE_NAME_1', // Check for unique page names in admin/structure/pages.
    'PAGE_NAME_2',
    '',
  );
  foreach ($pages as $name) {
    $page = page_manager_page_load($name);
    if (!empty($page)) {
      page_manager_page_delete($page);
    }
  }
}