Removed unused mojo_nacl code and GYP targets.

mojo/nacl/generator/libmojo.cc.tmpl

-// 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.
-
-{{generator_warning}}
-
-#include "mojo/nacl/mojo_irt.h"
-#include "mojo/public/c/system/core.h"
-#include "native_client/src/public/chrome_main.h"
-#include "native_client/src/public/imc_syscalls.h"
-#include "native_client/src/public/imc_types.h"
-#include "native_client/src/untrusted/irt/irt.h"
-
-// The value for this FD must not conflict with uses inside Chromium. However,
-// mojo/nacl doesn't depend on any Chromium headers, so we can't use a #define
-// from there.
-#define NACL_MOJO_DESC (NACL_CHROME_DESC_BASE + 3)
-
-bool g_irt_mojo_valid = false;
-struct nacl_irt_mojo g_irt_mojo;
-
-struct nacl_irt_mojo* get_irt_mojo() {
-  if (!g_irt_mojo_valid) {
-    size_t rc = nacl_interface_query(NACL_IRT_MOJO_v0_1,
-                                     &g_irt_mojo,
-                                     sizeof(g_irt_mojo));
-    if (rc != sizeof(g_irt_mojo))
-      return NULL;
-    else
-      g_irt_mojo_valid = true;
-  }
-  return &g_irt_mojo;
-}
-
-{{body}}