Remove GYP files.

third_party/boringssl/boringssl_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.
-{
-  'includes': [
-    '../../native_client/build/untrusted.gypi',
-  ],
-  'targets': [
-    {
-      'target_name': 'boringssl_nacl',
-      'type': 'none',
-      'variables': {
-        'nlib_target': 'libboringssl_nacl.a',
-        'build_glibc': 0,
-        'build_newlib': 0,
-        'build_pnacl_newlib': 1,
-      },
-      'dependencies': [
-        '<(DEPTH)/native_client_sdk/native_client_sdk_untrusted.gyp:nacl_io_untrusted',
-      ],
-      'includes': [
-        # Include the auto-generated gypi file.
-        'boringssl.gypi'
-      ],
-      'sources': [
-        '<@(boringssl_crypto_sources)',
-        '<@(boringssl_ssl_sources)',
-      ],
-      'defines': [
-        'OPENSSL_NO_ASM',
-      ],
-      'include_dirs': [
-        'src/include',
-      ],
-      'direct_dependent_settings': {
-        'include_dirs': [
-          'src/include',
-        ],
-      },
-      'pnacl_compile_flags': [
-        '-Wno-sometimes-uninitialized',
-        '-Wno-unused-variable',
-      ],
-    },  # target boringssl_nacl
-  ],
-}