[Sensors] Remove SensorReading interfaces

third_party/WebKit/Source/modules/sensor/SensorReading.cpp

-// Copyright 2016 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 "modules/sensor/SensorReading.h"
-
-#include "core/dom/ExecutionContext.h"
-#include "core/frame/LocalDOMWindow.h"
-#include "core/timing/DOMWindowPerformance.h"
-#include "core/timing/Performance.h"
-
-namespace blink {
-
-SensorReading::SensorReading(const device::SensorReading& data)
-    : m_data(data) {}
-
-SensorReading::~SensorReading() = default;
-
-DOMHighResTimeStamp SensorReading::timeStamp(ScriptState* scriptState) const {
-  LocalDOMWindow* window = scriptState->domWindow();
-  if (!window)
-    return 0.0;
-
-  Performance* performance = DOMWindowPerformance::performance(*window);
-  DCHECK(performance);
-
-  return performance->monotonicTimeToDOMHighResTimeStamp(data().timestamp);
-}
-
-}  // namespace blink