Remove HitTestFilter.

sky/engine/core/rendering/RenderObject.h

Index: sky/engine/core/rendering/RenderObject.h
diff --git a/sky/engine/core/rendering/RenderObject.h b/sky/engine/core/rendering/RenderObject.h
index 121ed890d14d2b4bd1727d57601d86a182d6bb04..a7c01694ac6ceb70ae3961d450efbdc9d242a163 100644
--- a/sky/engine/core/rendering/RenderObject.h
+++ b/sky/engine/core/rendering/RenderObject.h
@@ -68,12 +68,6 @@ enum CursorDirective {
     DoNotSetCursor
 };
 
-enum HitTestFilter {
-    HitTestAll,
-    HitTestSelf,
-    HitTestDescendants
-};
-
 enum HitTestAction {
     HitTestBlockBackground,
     HitTestForeground
@@ -450,7 +444,7 @@ public:
     void forceLayout();
     void forceChildLayout();
 
-    bool hitTest(const HitTestRequest&, HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestFilter = HitTestAll);
+    bool hitTest(const HitTestRequest&, HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset);
     virtual void updateHitTestResult(HitTestResult&, const LayoutPoint&);
     virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction);