Remove a number of unused features from WebViewImpl

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 92508d505f874295473adb9bc790b60270a70689..49b1280cb5e2b80493ec17dfbacfbd2af89e8ce9 100644
--- a/sky/engine/core/page/Page.h
+++ b/sky/engine/core/page/Page.h
@@ -106,9 +106,6 @@ public:
 
     UseCounter& useCounter() { return m_useCounter; }
 
-    void setTabKeyCyclesThroughElements(bool b) { m_tabKeyCyclesThroughElements = b; }
-    bool tabKeyCyclesThroughElements() const { return m_tabKeyCyclesThroughElements; }
-
     void unmarkAllTextMatches();
 
     float deviceScaleFactor() const { return m_deviceScaleFactor; }
@@ -182,8 +179,6 @@ private:
 
     UseCounter m_useCounter;
 
-    bool m_tabKeyCyclesThroughElements;
-
     float m_deviceScaleFactor;
 
     double m_timerAlignmentInterval;