Remove lots of machinery related to inline event handlers.

sky/engine/core/css/FontFaceSet.h

Index: sky/engine/core/css/FontFaceSet.h
diff --git a/sky/engine/core/css/FontFaceSet.h b/sky/engine/core/css/FontFaceSet.h
index 6a334872573e8352e4eb8dcb5990a4c14c69fd03..c953025f758e0b8ff2c9812d12b63f68a25d3404 100644
--- a/sky/engine/core/css/FontFaceSet.h
+++ b/sky/engine/core/css/FontFaceSet.h
@@ -70,10 +70,6 @@ class FontFaceSet FINAL : public RefCountedSupplement<Document, FontFaceSet>, pu
 public:
     virtual ~FontFaceSet();
 
-    DEFINE_ATTRIBUTE_EVENT_LISTENER(loading);
-    DEFINE_ATTRIBUTE_EVENT_LISTENER(loadingdone);
-    DEFINE_ATTRIBUTE_EVENT_LISTENER(loadingerror);
-
     bool check(const String& font, const String& text, ExceptionState&);
     ScriptPromise load(ScriptState*, const String& font, const String& text);
     ScriptPromise ready(ScriptState*);