chromeos: Remove unused NFC D-Bus client library

device/nfc/nfc_tag_technology.cc

-// Copyright 2013 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.
-
-#include "device/nfc/nfc_tag_technology.h"
-
-#include "device/nfc/nfc_tag.h"
-
-namespace device {
-
-NfcTagTechnology::NfcTagTechnology(NfcTag* tag) : tag_(tag) {
-}
-
-NfcTagTechnology::NfcTagTechnology() : tag_(NULL) {
-}
-
-NfcTagTechnology::~NfcTagTechnology() {
-}
-
-bool NfcNdefTagTechnology::IsSupportedByTag() const {
-  return tag() && (tag()->GetSupportedTechnologies() &
-      NfcTagTechnology::kTechnologyTypeNdef);
-}
-
-NfcNdefTagTechnology::NfcNdefTagTechnology(NfcTag* tag)
-    : NfcTagTechnology(tag) {
-}
-
-NfcNdefTagTechnology::~NfcNdefTagTechnology() {
-}
-
-}  // namespace device