Remove old API from WebLeakDetector.

public/web/WebLeakDetector.h

Index: public/web/WebLeakDetector.h
diff --git a/public/web/WebLeakDetector.h b/public/web/WebLeakDetector.h
index 187b86c9a11d4213866f065add72d6eb8d3e9142..2b3b435cad648982be68b6bf818ae2f2de1cb873 100644
--- a/public/web/WebLeakDetector.h
+++ b/public/web/WebLeakDetector.h
@@ -55,9 +55,6 @@ public:
     // Cleans up the DOM objects and counts them. |WebLeakDetectorClient::onLeakDetectionComplete()| is called when done.
     // This is supposed to be used for detecting DOM-object leaks.
     virtual void collectGarbageAndGetDOMCounts(WebLocalFrame*) = 0;
-
-    // FIXME: old API to be removed.
-    static void collectGarbargeAndGetDOMCounts(WebLocalFrame*, unsigned*, unsigned*) { }
 };
 
 } // namespace blink