Remove Constructor attributes on DOMWindow because of [EnabledAtRuntime]

Source/core/html/HTMLSourceElement.idl

 /*
  * Copyright (C) 2007, 2010 Apple Inc.  All rights reserved.
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 [
-    NoInterfaceObject
+    EnabledAtRuntime=media
 ] interface HTMLSourceElement : HTMLElement {
 [Reflect, URL] attribute DOMString src;
     attribute DOMString type;
     attribute DOMString media;
 };