Remove WebApkServiceImpl#getBroadcastPendingIntent() because it is unneeded

chrome/android/webapk/libs/runtime_library/src/org/chromium/webapk/lib/runtime_library/IWebApkApi.aidl

 // Copyright 2015 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.
 
 package org.chromium.webapk.lib.runtime_library;
 
 import android.app.Notification;
-import android.app.PendingIntent;
-import android.content.Intent;
-import android.os.Bundle;
 
 /**
 * Interface for communicating between the minted helper service and Chrome.
  */
 interface IWebApkApi {
-    // Given an Intent, creates a PendingIntent which is broadcasted by the WebAPK.
-    PendingIntent getBroadcastPendingIntent(int requestCode, in Intent intent, int flags);
-
     // Get the small icon id for displaying a notification.
     int getSmallIconId();
 
     // Display a notification.
     void displayNotification(String platformTag, int platformID, in Notification notification);
 
     // Close a notification.
     void closeNotification(String platformTag, int platformID);
 }