Remove unused libxml dependencies.

chromeos/chromeos.gyp

 # 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.
 
 {
   'variables': {
     'chromium_code': 1,
     # These files lists are shared with the GN build.
     'chromeos_sources': [
       'accelerometer/accelerometer_reader.cc',
@@ skipping 508 matching lines @@
         '../components/components.gyp:onc_component',
         '../components/components.gyp:proxy_config',
         '../components/components.gyp:user_manager',
         '../components/components.gyp:signin_core_account_id',
         '../components/prefs/prefs.gyp:prefs',
         '../crypto/crypto.gyp:crypto',
         '../dbus/dbus.gyp:dbus',
         '../google_apis/google_apis.gyp:google_apis',
         '../net/net.gyp:net',
         '../third_party/icu/icu.gyp:icui18n',
-        '../third_party/libxml/libxml.gyp:libxml',
         '../third_party/protobuf/protobuf.gyp:protobuf_lite',
         '../url/url.gyp:url_lib',
         'attestation_proto',
         'cryptohome_proto',
         'power_manager_proto',
       ],
       'defines': [
         'CHROMEOS_IMPLEMENTATION',
       ],
       'sources': [ '<@(chromeos_sources)' ],
@@ skipping 216 matching lines @@
             '../build/isolate.gypi',
           ],
           'sources': [
             'chromeos_unittests.isolate',
           ],
         },
       ],
     }],
   ],
 }