hunspell should not include build/common.gypi once issue 206006 is landed.

hunspell.gyp

 # Copyright (c) 2009 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': [
-    '../../build/common.gypi',
-  ],
   'targets': [
     {
       'target_name': 'hunspell',
       'type': '<(library)',
       'msvs_guid': 'D5E8DCB2-9C61-446F-8BEE-B18CA0E0936E',
       'dependencies': [
         '../../base/base.gyp:base',
         '../icu/icu.gyp:icuuc',
       ],
       'defines': [
@@ skipping 51 matching lines @@
           'cflags': [
             '-Wno-unused-value',
             '-Wno-unused-variable',
             '-Wno-write-strings',
           ],
         }],
       ],
     },
   ],
 }