Remove UseCounter

sky/engine/core/events/EventTarget.cpp

Index: sky/engine/core/events/EventTarget.cpp
diff --git a/sky/engine/core/events/EventTarget.cpp b/sky/engine/core/events/EventTarget.cpp
index a1388e77724315be1dcb16211cd1c730b68859bf..36a41531f6c13f3084b590ce2ff55817d6f18b30 100644
--- a/sky/engine/core/events/EventTarget.cpp
+++ b/sky/engine/core/events/EventTarget.cpp
@@ -40,7 +40,6 @@
 #include "sky/engine/core/editing/Editor.h"
 #include "sky/engine/core/events/Event.h"
 #include "sky/engine/core/frame/LocalDOMWindow.h"
-#include "sky/engine/core/frame/UseCounter.h"
 #include "sky/engine/platform/EventDispatchForbiddenScope.h"
 #include "sky/engine/wtf/StdLibExtras.h"
 #include "sky/engine/wtf/Vector.h"
@@ -204,17 +203,6 @@ void EventTarget::fireEventListeners(Event* event, EventTargetData* d, EventList
     // index |size|, so iterating up to (but not including) |size| naturally excludes
     // new event listeners.
 
-    if (event->type() == EventTypeNames::unload) {
-        if (LocalDOMWindow* executingWindow = this->executingWindow())
-            UseCounter::count(executingWindow->document(), UseCounter::DocumentUnloadFired);
-    } else if (event->type() == EventTypeNames::DOMFocusIn || event->type() == EventTypeNames::DOMFocusOut) {
-        if (LocalDOMWindow* executingWindow = this->executingWindow())
-            UseCounter::count(executingWindow->document(), UseCounter::DOMFocusInOutEvent);
-    } else if (event->type() == EventTypeNames::focusin || event->type() == EventTypeNames::focusout) {
-        if (LocalDOMWindow* executingWindow = this->executingWindow())
-            UseCounter::count(executingWindow->document(), UseCounter::FocusInOutEvent);
-    }
-
     size_t i = 0;
     size_t size = entry.size();
     if (!d->firingEventIterators)