Clean up forward declarations in Source/modules

Source/modules/device_light/DeviceLightDispatcher.h

Index: Source/modules/device_light/DeviceLightDispatcher.h
diff --git a/Source/modules/device_light/DeviceLightDispatcher.h b/Source/modules/device_light/DeviceLightDispatcher.h
index fef082215ca3b240c3fd2be5a8a8ee764a5271e7..ff130366a02ba9dff33fdba51fe8b1fb53567403 100644
--- a/Source/modules/device_light/DeviceLightDispatcher.h
+++ b/Source/modules/device_light/DeviceLightDispatcher.h
@@ -8,12 +8,9 @@
 #include "core/frame/PlatformEventDispatcher.h"
 #include "platform/heap/Handle.h"
 #include "public/platform/WebDeviceLightListener.h"
-#include "wtf/RefPtr.h"
 
 namespace blink {
 
-class DeviceLightController;
-
 // This class listens to device light data and notifies all registered controllers.
 class DeviceLightDispatcher final : public GarbageCollectedFinalized<DeviceLightDispatcher>, public PlatformEventDispatcher, public WebDeviceLightListener {
     USING_GARBAGE_COLLECTED_MIXIN(DeviceLightDispatcher);