Cleanup/Remove Windows XP/Vista version checks from Windows sandbox code

sandbox/win/sandbox_win.gypi

 # Copyright (c) 2012 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.
 
 {
   'target_defaults': {
     'variables': {
       'sandbox_windows_target': 0,
       'target_arch%': 'ia32',
     },
@@ skipping 130 matching lines @@
             'src/window.cc',
             'src/window.h',
         ],
         'target_conditions': [
           ['target_arch=="x64"', {
             'sources': [
               'src/interceptors_64.cc',
               'src/interceptors_64.h',
               'src/resolver_64.cc',
               'src/service_resolver_64.cc',
-              'src/Wow64_64.cc',
             ],
           }],
           ['target_arch=="ia32"', {
             'sources': [
               'src/resolver_32.cc',
               'src/service_resolver_32.cc',
               'src/sidestep_resolver.cc',
               'src/sidestep_resolver.h',
               'src/sidestep\ia32_modrm_map.cpp',
               'src/sidestep\ia32_opcode_map.cpp',
               'src/sidestep\mini_disassembler_types.h',
               'src/sidestep\mini_disassembler.cpp',
               'src/sidestep\mini_disassembler.h',
               'src/sidestep\preamble_patcher_with_stub.cpp',
               'src/sidestep\preamble_patcher.h',
-              'src/Wow64.cc',
-              'src/Wow64.h',
             ],
           }],
         ],
       }],
     ],
   },
   'targets': [
     {
       'target_name': 'sandbox',
       'type': 'static_library',
@@ skipping 218 matching lines @@
             '../../build/isolate.gypi',
           ],
           'sources': [
             '../sbox_validation_tests.isolate',
           ],
         },
       ],
     }],
   ],
 }