Remove DeviceLightEvent implementation

device/sensors/public/cpp/device_light_hardware_buffer.h

Index: device/sensors/public/cpp/device_light_hardware_buffer.h
diff --git a/device/sensors/public/cpp/device_light_hardware_buffer.h b/device/sensors/public/cpp/device_light_hardware_buffer.h
deleted file mode 100644
index 039d22ad9bea89a164f6a6694d6fbf72b46b8946..0000000000000000000000000000000000000000
--- a/device/sensors/public/cpp/device_light_hardware_buffer.h
+++ /dev/null
@@ -1,17 +0,0 @@
-// 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.
-
-#ifndef DEVICE_SENSORS_PUBLIC_CPP_DEVICE_LIGHT_HARDWARE_BUFFER_H_
-#define DEVICE_SENSORS_PUBLIC_CPP_DEVICE_LIGHT_HARDWARE_BUFFER_H_
-
-#include "device/base/synchronization/shared_memory_seqlock_buffer.h"
-#include "device/sensors/public/cpp/device_light_data.h"
-
-namespace device {
-
-typedef SharedMemorySeqLockBuffer<DeviceLightData> DeviceLightHardwareBuffer;
-
-}  // namespace device
-
-#endif  // DEVICE_SENSORS_PUBLIC_CPP_DEVICE_LIGHT_HARDWARE_BUFFER_H_