Remove SVGLangSpace IDL interface

Source/core/svg/SVGTitleElement.h

Index: Source/core/svg/SVGTitleElement.h
diff --git a/Source/core/svg/SVGTitleElement.h b/Source/core/svg/SVGTitleElement.h
index 5e84bf73581d3f7a0f66c3d5f532db2e2b16f979..0edbc541fbd74934df095c610ec26f91f144b0a4 100644
--- a/Source/core/svg/SVGTitleElement.h
+++ b/Source/core/svg/SVGTitleElement.h
@@ -21,13 +21,11 @@
 #ifndef SVGTitleElement_h
 #define SVGTitleElement_h
 
-#include "core/svg/SVGLangSpace.h"
 #include "core/svg/SVGStyledElement.h"
 
 namespace WebCore {
 
-class SVGTitleElement FINAL : public SVGStyledElement,
-                              public SVGLangSpace {
+class SVGTitleElement FINAL : public SVGStyledElement {
 public:
     static PassRefPtr<SVGTitleElement> create(const QualifiedName&, Document*);