hideKeyringSetup_() {
    var elements = [
      goog.dom.getElement(constants.ElementId.WELCOME_MENU_NOVICE),
      goog.dom.getElement(constants.ElementId.WELCOME_MENU_ADVANCED)
    ];

    goog.array.forEach(elements, function(elem) {
      elem.parentElement.removeChild(elem);
    });
  }
Hides the UI for setting up the keyring.
@private