Remove SVGDocument binding

Source/core/svg/SVGDocument.idl

Index: Source/core/svg/SVGDocument.idl
diff --git a/Source/core/svg/SVGDocument.idl b/Source/core/svg/SVGDocument.idl
index 7f91e93369dc4504325f45a5918fa2ac3a9dcf9f..b8664f36d1f51478d40c58fc6aef78ff717cbb07 100644
--- a/Source/core/svg/SVGDocument.idl
+++ b/Source/core/svg/SVGDocument.idl
@@ -19,11 +19,7 @@
  * Boston, MA 02110-1301, USA.
  */
 
-// FIXME: This interface no longer exists in SVG2.
-interface SVGDocument : XMLDocument {
+partial interface Document {
     readonly attribute SVGSVGElement        rootElement;

[Erik Dahlström (inactive), 2014/01/24 12:57:01]

Please add a UseCounter for this, this is mostly just a legacy duplicate of
document.documentElement. I'd prefer if we could just remove it.

[Inactive, 2014/01/24 14:02:00]

It is still part of the spec though:
https://svgwg.org/svg2-draft/single-page.html#struct-__svg__SVGDocument__root...

[arv (Not doing code reviews), 2014/01/24 14:46:52]

I would also prefer a UseCounter for this. Spec or no spec. We are all in the
same boat.

-
-    // Overwrite the one in events::DocumentEvent
-    [RaisesException] Event createEvent([Default=Undefined] optional DOMString eventType);
 };