Eliminate third_party/mojo/src from all targets' include paths

mojo/mojo_edk.gyp

 # 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.
 
 {
   'includes': [
     '../third_party/mojo/mojo_variables.gypi',
   ],
   'target_defaults' : {
     'include_dirs': [
       '..',
-      '../third_party/mojo/src',
     ],
     'direct_dependent_settings': {
       'include_dirs': [
         '..',
       ],
     },
   },
   'targets': [
     {
       # GN version: //mojo/edk/system
@@ skipping 193 matching lines @@
         '../third_party/mojo/mojo_public.gyp:mojo_public_test_support',
         'mojo_system_impl2',
         'mojo_test_support_impl2',
       ],
       'sources': [
         'edk/test/run_all_unittests.cc',
       ],
     },
   ],
 }