NaCl/GYP: remove references to prep_toolchain.

net/net_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',
     'net.gypi',
   ],
   'targets': [
     {
       'target_name': 'net_nacl',
       'type': 'none',
       'variables': {
         'nacl_untrusted_build': 1,
         'nlib_target': 'libnet_nacl.a',
         'build_glibc': 0,
         'build_newlib': 0,
         'build_pnacl_newlib': 1,
       },
       'dependencies': [
         '../crypto/crypto_nacl.gyp:crypto_nacl',
-        '../native_client/tools.gyp:prep_toolchain',
         '../native_client_sdk/native_client_sdk_untrusted.gyp:nacl_io_untrusted',
         '../third_party/boringssl/boringssl_nacl.gyp:boringssl_nacl',
         '../third_party/protobuf/protobuf.gyp:protobuf_lite',
         '../url/url_nacl.gyp:url_nacl',
         'net.gyp:net_derived_sources',
         'net.gyp:net_quic_proto',
         'net.gyp:net_resources',
       ],
       'defines': [
         'NET_IMPLEMENTATION',
       ],
       'pnacl_compile_flags': [
         '-Wno-bind-to-temporary-copy',
       ],
       'sources': [
         '<@(net_nacl_common_sources)',
       ],
     },
   ],
 }