Remove "nacl_defines" from the GYP build.

mojo/mojo_nacl_untrusted.gyp

 # Copyright 2014 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.
 
 {
   'conditions': [
     ['disable_nacl==0 and disable_nacl_untrusted==0', {
       'includes': [
         '../build/common_untrusted.gypi',
-        '../components/nacl/nacl_defines.gypi',
         '../mojo/mojo_nacl.gypi',
         '../third_party/mojo/mojo_variables.gypi',
       ],
       'targets': [
         {
           'target_name': 'libmojo',
           'type': 'none',
           'variables': {
             'nlib_target': 'libmojo.a',
             'build_glibc': 0,
             'build_newlib': 0,
             'build_pnacl_newlib': 1,
           },
-          'defines': [
-            '<@(nacl_defines)',
-          ],
           'sources': [
             '<(monacl_codegen_dir)/libmojo.cc',
           ],
           'dependencies': [
             'mojo_nacl.gyp:monacl_codegen',
             '../third_party/mojo/mojo_public.gyp:mojo_system_placeholder',
           ],
         },
         {
           'target_name': 'monacl_test',
@@ skipping 20 matching lines @@
             '../testing/gtest_nacl.gyp:gtest_nacl',
             '../testing/gtest_nacl.gyp:gtest_main_nacl',
             'libmojo',
             'mojo_nacl.gyp:monacl_codegen',
           ],
         },
       ],
     }],
   ],
 }