NaCl/GYP: remove references to prep_toolchain.

jingle/jingle_nacl.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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'includes': [
     '../native_client/build/untrusted.gypi',
@@ skipping 13 matching lines @@
       'sources': [
         '<@(jingle_glue_sources)',
       ],
       'sources!': [
         'glue/chrome_async_socket.cc',
         'glue/proxy_resolving_client_socket.cc',
         'glue/xmpp_client_socket_factory.cc',
       ],
       'dependencies': [
         '../base/base_nacl.gyp:base_nacl',
-        '../native_client/tools.gyp:prep_toolchain',
         '../net/net_nacl.gyp:net_nacl',
         '../third_party/libjingle/libjingle_nacl.gyp:libjingle_nacl',
       ],
       'export_dependent_settings': [
         '../third_party/libjingle/libjingle_nacl.gyp:libjingle_nacl',
       ],
     }
   ]
 }