Remove unused files after SignedSettings is dead.

chrome/browser/chromeos/settings/mock_owner_key_utils.cc

Index: chrome/browser/chromeos/settings/mock_owner_key_utils.cc
diff --git a/chrome/browser/chromeos/settings/mock_owner_key_utils.cc b/chrome/browser/chromeos/settings/mock_owner_key_utils.cc
deleted file mode 100644
index 55ed5d4c76778284f58227139f8d0ff5a99abc0c..0000000000000000000000000000000000000000
--- a/chrome/browser/chromeos/settings/mock_owner_key_utils.cc
+++ /dev/null
@@ -1,20 +0,0 @@
-// Copyright (c) 2012 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 "chrome/browser/chromeos/settings/mock_owner_key_utils.h"
-
-namespace chromeos {
-
-MockKeyUtils::MockKeyUtils() {}
-
-MockKeyUtils::~MockKeyUtils() {}
-
-MockInjector::MockInjector(MockKeyUtils* mock) : transient_(mock) {}
-
-MockInjector::~MockInjector() {}
-
-OwnerKeyUtils* MockInjector::CreateOwnerKeyUtils() {
-  return transient_.get();
-}
-}  // namespace chromeos