Remove prefixed EME.

media/test/data/eme_player_js/prefixed_widevine_player.js

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Widevine player responsible for playing media using Widevine key system
-// and prefixed EME API.
-function PrefixedWidevinePlayer(video, testConfig) {
-  this.video = video;
-  this.testConfig = testConfig;
-}
-
-PrefixedWidevinePlayer.prototype.init = function() {
-  // Returns a promise.
-  return PlayerUtils.initEMEPlayer(this);
-};
-
-PrefixedWidevinePlayer.prototype.registerEventListeners = function() {
-  // Returns a promise.
-  return PlayerUtils.registerPrefixedEMEEventListeners(this);
-};
-
-PrefixedWidevinePlayer.prototype.onWebkitKeyMessage = function(message) {
-  function onSuccess(response) {
-    var key = new Uint8Array(response);
-    Utils.timeLog('Adding key to sessionID: ' + message.sessionId, key);
-    message.target.webkitAddKey(this.testConfig.keySystem,
-                                key,
-                                new Uint8Array(1),
-                                message.sessionId);
-  }
-  Utils.sendRequest('POST', 'arraybuffer', message.message,
-                    this.testConfig.licenseServerURL, onSuccess,
-                    this.testConfig.forceInvalidResponse);
-};