Remove UseCounter

sky/engine/core/page/Page.h

Index: sky/engine/core/page/Page.h
diff --git a/sky/engine/core/page/Page.h b/sky/engine/core/page/Page.h
index 49b1280cb5e2b80493ec17dfbacfbd2af89e8ce9..188a1bfb5a5486098e38a59323b15b9bbcd71c01 100644
--- a/sky/engine/core/page/Page.h
+++ b/sky/engine/core/page/Page.h
@@ -23,7 +23,6 @@
 
 #include "sky/engine/core/frame/LocalFrame.h"
 #include "sky/engine/core/frame/SettingsDelegate.h"
-#include "sky/engine/core/frame/UseCounter.h"
 #include "sky/engine/core/page/PageAnimator.h"
 #include "sky/engine/core/page/PageVisibilityState.h"
 #include "sky/engine/platform/LifecycleContext.h"
@@ -104,8 +103,6 @@ public:
 
     Settings& settings() const { return *m_settings; }
 
-    UseCounter& useCounter() { return m_useCounter; }
-
     void unmarkAllTextMatches();
 
     float deviceScaleFactor() const { return m_deviceScaleFactor; }
@@ -177,8 +174,6 @@ private:
     EditorClient* const m_editorClient;
     SpellCheckerClient* const m_spellCheckerClient;
 
-    UseCounter m_useCounter;
-
     float m_deviceScaleFactor;
 
     double m_timerAlignmentInterval;