Delete old x86 validator.

src/trusted/validator/BUILD.gn

 # Copyright (c) 2014 The Native ClientAuthors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 #  Generated from GYP
 
 static_library("validators") {
-  defines = [
-    "NACL_VALIDATOR_RAGEL=1",
-  ]
   sources = [
     "validator_init.c",
   ]
 }
 
 static_library("validation_cache") {
   sources = [
     "validation_cache.c",
   ]
   deps = [
     "//native_client/src/shared/platform:platform",
   ]
 }