Revert of Add U2F request state machines

device/u2f/mock_u2f_device.h

Index: device/u2f/mock_u2f_device.h
diff --git a/device/u2f/mock_u2f_device.h b/device/u2f/mock_u2f_device.h
deleted file mode 100644
index f4e65da0524418633169f24d71ed0e8c4e996eca..0000000000000000000000000000000000000000
--- a/device/u2f/mock_u2f_device.h
+++ /dev/null
@@ -1,43 +0,0 @@
-// Copyright 2017 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 DEVICE_U2F_MOCK_U2F_DEVICE_H_
-#define DEVICE_U2F_MOCK_U2F_DEVICE_H_
-
-#include <vector>
-
-#include "base/memory/ptr_util.h"
-#include "testing/gmock/include/gmock/gmock.h"
-#include "u2f_apdu_command.h"
-#include "u2f_device.h"
-
-namespace device {
-
-class MockU2fDevice : public U2fDevice {
- public:
-  static constexpr uint8_t kSign = 0x1;
-  static constexpr uint8_t kRegister = 0x5;
-
-  MockU2fDevice();
-  ~MockU2fDevice() override;
-
-  MOCK_METHOD1(TryWink, void(const WinkCallback& cb));
-  MOCK_METHOD0(GetId, std::string(void));
-  // GMock cannot mock a method taking a std::unique_ptr<T>
-  MOCK_METHOD2(DeviceTransactPtr,
-               void(U2fApduCommand* command, const DeviceCallback& cb));
-  void DeviceTransact(std::unique_ptr<U2fApduCommand> command,
-                      const DeviceCallback& cb) override;
-  static void TransactNoError(std::unique_ptr<U2fApduCommand> command,
-                              const DeviceCallback& cb);
-  static void NotSatisfied(U2fApduCommand* cmd, const DeviceCallback& cb);
-  static void WrongData(U2fApduCommand* cmd, const DeviceCallback& cb);
-  static void NoErrorSign(U2fApduCommand* cmd, const DeviceCallback& cb);
-  static void NoErrorRegister(U2fApduCommand* cmd, const DeviceCallback& cb);
-  static void WinkDoNothing(const WinkCallback& cb);
-};
-
-}  // namespace device
-
-#endif  // DEVICE_U2F_MOCK_U2F_DEVICE_H_