How we can Empty Front Drupalgap

/**
 * Implements hook_menu().
 */
function front_menu() {
  var items = {};
  items['front'] = {
    title: 'ANSCO',
    page_callback: 'front_hello_world_page'
  };
  return items;
}

/**
 * The callback for the "Hello World" page.
 */
function front_hello_world_page() {
  var content = {};
  content['my_button'] = {
    text: '',

  };
  return content;
}