Delete entire playlist Watch Later on Youtube

delete_watchlater_in_youtube_LEGACY.js

var items = $('body').getElementsByClassName("yt-uix-button yt-uix-button-size-default yt-uix-button-default yt-uix-button-empty yt-uix-button-has-icon no-icon-markup pl-video-edit-remove yt-uix-tooltip");

function deleteWL(i) {
  setInterval(function() {
    items[i].click();
  }, 500);

}

for (var i = 0; i < 1; ++i)
  deleteWL(i);