Remove autocheckout code.

components/autofill/core/browser/autocheckout_bubble_state.h

-// 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.
-
-#ifndef COMPONENTS_AUTOFILL_CORE_BROWSER_AUTOCHECKOUT_BUBBLE_STATE_H_
-#define COMPONENTS_AUTOFILL_CORE_BROWSER_AUTOCHECKOUT_BUBBLE_STATE_H_
-
-namespace autofill {
-
-// Specifies the state of Autocheckout bubble.
-enum AutocheckoutBubbleState {
-  // User clicked on continue.
-  AUTOCHECKOUT_BUBBLE_ACCEPTED = 0,
-  // User clicked on "No Thanks".
-  AUTOCHECKOUT_BUBBLE_CANCELED = 1,
-  // Bubble is ignored.
-  AUTOCHECKOUT_BUBBLE_IGNORED = 2,
-};
-
-}  // namespace autofill
-
-#endif  // COMPONENTS_AUTOFILL_CORE_BROWSER_AUTOCHECKOUT_BUBBLE_STATE_H_