Revert of media: Add ProvisionFetcher mojo interface and implementation.

media/mojo/interfaces/provision_fetcher.mojom

-// 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.
-
-module media.interfaces;
-
-// An interface to retrieve provision information for Android MediaDrm.
-// See Android documentation about MediaDrm provisioning:
-// https://developer.android.com/reference/android/media/MediaDrm.ProvisionRequest.html
-
-interface ProvisionFetcher {
-  // Requests the provision information with |default_url| and |request_data|
-  // and returns |result| and the |response|. The input parameters |default_url|
-  // and |request_data| corresponds to Java class MediaDrm.ProvisionRequest.
-  // |response| will be null iff |result| is false.
-  Retrieve(string default_url, string request_data)
-      => (bool result, string? response);
-};