Remove support for [EventTarget] IDL extended attribute

Source/core/dom/EventTarget.idl

Index: Source/core/dom/EventTarget.idl
diff --git a/Source/core/dom/EventTarget.idl b/Source/core/dom/EventTarget.idl
index 8647c2730f48dca3e25b6f1c14ac9e833e523416..d711cd727e291210bd00c39cbacaa6de6ce334a0 100644
--- a/Source/core/dom/EventTarget.idl
+++ b/Source/core/dom/EventTarget.idl
@@ -20,15 +20,13 @@
 
 [
     CustomToV8,
-    DoNotGenerateWrap,
-    EventTarget
+    DoNotGenerateWrap
 ] interface EventTarget {
     void addEventListener(DOMString type, 
-                                         EventListener listener, 
-                                         optional boolean useCapture);
+                          EventListener listener,
+                          optional boolean useCapture);
     void removeEventListener(DOMString type, 
-                                         EventListener listener, 
-                                         optional boolean useCapture);
+                             EventListener listener,
+                             optional boolean useCapture);
     [RaisesException] boolean dispatchEvent(Event event);
 };
-