Revert of Introduce InterfaceEndpointClient(IEC), InterfaceEndpointHandle and

ios/web/webui/resources/timer.js

-// Copyright 2017 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.
-
-// Module "timer"
-//
-// This module provides basic createOneShot, createRepeating support. The
-// reason to define this module is to forward calls to setTimeout, setInterval
-// exposed by the browser. Mojo JS bindings are currently loaded using gin
-// and createOneShot, createRepeating are not always available.
-//
-// TODO(crbug.com/703380): When the Mojo JS bindings move away from gin,
-// this module could be removed.
-
-define("timer", [], function() {
-  /**
-   * Executes a function once after the set time delay.
-   * @param {int} delay Milliseconds to wait before executing the code.
-   * @callback callback
-   */
-  function createOneShot(delay, callback) {
-    setTimeout(callback, delay);
-  }
-
-  /**
-   * Repeatedly executes a function with a fixed time delay between each call.
-   * @param {int} delay Milliseconds to wait between executions of the code
-   * @callback callback
-   */
-  function createRepeating(delay, callback) {
-    setInterval(callback, delay);
-  }
-
-  var exports = {};
-  exports.createOneShot = createOneShot;
-  exports.createRepeating = createRepeating;
-  return exports;
-});