Remove unused hit testing modes in Sky

sky/engine/core/rendering/HitTestRequest.h

Index: sky/engine/core/rendering/HitTestRequest.h
diff --git a/sky/engine/core/rendering/HitTestRequest.h b/sky/engine/core/rendering/HitTestRequest.h
index 7881c797bbc7e0a02ed0281720a1a116cbde02a1..720c502fea8e30261311f3b907e5fb840dd25ed8 100644
--- a/sky/engine/core/rendering/HitTestRequest.h
+++ b/sky/engine/core/rendering/HitTestRequest.h
@@ -35,10 +35,7 @@ public:
         IgnoreClipping = 1 << 5,
         SVGClipContent = 1 << 6,
         TouchEvent = 1 << 7,
-        AllowFrameScrollbars = 1 << 8,
-        AllowChildFrameContent = 1 << 9,
-        ChildFrameHitTest = 1 << 10,
-        IgnorePointerEventsNone = 1 << 11,
+        IgnorePointerEventsNone = 1 << 8,
     };
 
     typedef unsigned HitTestRequestType;
@@ -55,15 +52,10 @@ public:
     bool ignoreClipping() const { return m_requestType & IgnoreClipping; }
     bool svgClipContent() const { return m_requestType & SVGClipContent; }
     bool touchEvent() const { return m_requestType & TouchEvent; }
-    bool mouseEvent() const { return !touchEvent(); }
-    bool allowsFrameScrollbars() const { return m_requestType & AllowFrameScrollbars; }
-    bool allowsChildFrameContent() const { return m_requestType & AllowChildFrameContent; }
-    bool isChildFrameHitTest() const { return m_requestType & ChildFrameHitTest; }
     bool ignorePointerEventsNone() const { return m_requestType & IgnorePointerEventsNone; }
 
     // Convenience functions
     bool touchMove() const { return move() && touchEvent(); }
-    bool touchRelease() const { return release() && touchEvent(); }
 
     HitTestRequestType type() const { return m_requestType; }