Reduce repetitive EventTarget subclassing

Source/core/page/DOMWindow.cpp

Index: Source/core/page/DOMWindow.cpp
diff --git a/Source/core/page/DOMWindow.cpp b/Source/core/page/DOMWindow.cpp
index 058b9b799eb9e163010a7d66ab6a9178146f04d3..111c11eb0fef31fe661702cb088452cf0af26a5f 100644
--- a/Source/core/page/DOMWindow.cpp
+++ b/Source/core/page/DOMWindow.cpp
@@ -1543,16 +1543,6 @@ void DOMWindow::finishedLoading()
     }
 }
 
-EventTargetData* DOMWindow::eventTargetData()
-{
-    return &m_eventTargetData;
-}
-
-EventTargetData* DOMWindow::ensureEventTargetData()
-{
-    return &m_eventTargetData;
-}
-
 void DOMWindow::setLocation(const String& urlString, DOMWindow* activeWindow, DOMWindow* firstWindow, SetLocationLocking locking)
 {
     if (!isCurrentlyDisplayedInFrame())