Revert r1998, it breaks iOS builds

test/mac/libtool-zero/test.gyp

Index: test/mac/libtool-zero/test.gyp
===================================================================
--- test/mac/libtool-zero/test.gyp	(revision 2000)
+++ test/mac/libtool-zero/test.gyp	(working copy)
@@ -1,15 +0,0 @@
-# Copyright (c) 2014 Google Inc. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-{
-  'targets': [
-    {
-      'target_name': 'mylib',
-      'type': 'static_library',
-      'sources': [
-        'mylib.c',
-      ],
-    },
-  ],
-}