[bootstrapper] Remove Intl experimental natives files

src/js/datetime-format-to-parts.js

Index: src/js/datetime-format-to-parts.js
diff --git a/src/js/datetime-format-to-parts.js b/src/js/datetime-format-to-parts.js
deleted file mode 100644
index 3194f50672cddd113a22e5888ff2f0169427434c..0000000000000000000000000000000000000000
--- a/src/js/datetime-format-to-parts.js
+++ /dev/null
@@ -1,16 +0,0 @@
-// Copyright 2016 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-(function(global, utils) {
-"use strict";
-
-%CheckIsBootstrapping();
-
-var GlobalIntl = global.Intl;
-var FormatDateToParts = utils.ImportNow("FormatDateToParts");
-
-utils.InstallFunctions(GlobalIntl.DateTimeFormat.prototype,  DONT_ENUM, [
-    'formatToParts', FormatDateToParts
-]);
-})