Remove DeviceLightEvent implementation

third_party/WebKit/Source/modules/device_light/DeviceLightEvent.cpp

-// 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.
-
-#include "modules/device_light/DeviceLightEvent.h"
-
-namespace blink {
-
-DeviceLightEvent::~DeviceLightEvent() {}
-
-DeviceLightEvent::DeviceLightEvent(const AtomicString& event_type, double value)
-    // The DeviceLightEvent bubbles but is not cancelable.
-    : Event(event_type, true, false), value_(value) {}
-
-DeviceLightEvent::DeviceLightEvent(const AtomicString& event_type,
-                                   const DeviceLightEventInit& initializer)
-    : Event(event_type, initializer),
-      value_(initializer.hasValue() ? initializer.value()
-                                    : std::numeric_limits<double>::infinity()) {
-  SetCanBubble(true);
-}
-
-const AtomicString& DeviceLightEvent::InterfaceName() const {
-  return EventNames::DeviceLightEvent;
-}
-
-}  // namespace blink