Remove SVGLangSpace IDL interface

Source/core/svg/SVGAElement.h

Index: Source/core/svg/SVGAElement.h
diff --git a/Source/core/svg/SVGAElement.h b/Source/core/svg/SVGAElement.h
index 78a3db5e9bcc2763c10f60887424490f2122b107..36ced8fee98187798e1870e2b6fba9d36e6350c7 100644
--- a/Source/core/svg/SVGAElement.h
+++ b/Source/core/svg/SVGAElement.h
@@ -24,7 +24,6 @@
 
 #include "core/svg/SVGAnimatedBoolean.h"
 #include "core/svg/SVGExternalResourcesRequired.h"
-#include "core/svg/SVGLangSpace.h"
 #include "core/svg/SVGStyledTransformableElement.h"
 #include "core/svg/SVGTests.h"
 #include "core/svg/SVGURIReference.h"
@@ -34,7 +33,6 @@ namespace WebCore {
 class SVGAElement FINAL : public SVGStyledTransformableElement,
                           public SVGURIReference,
                           public SVGTests,
-                          public SVGLangSpace,
                           public SVGExternalResourcesRequired {
 public:
     static PassRefPtr<SVGAElement> create(const QualifiedName&, Document*);