Remove unnecessary operator overload on RenderLayer::hitTest.

sky/engine/core/rendering/RenderLayer.h

Index: sky/engine/core/rendering/RenderLayer.h
diff --git a/sky/engine/core/rendering/RenderLayer.h b/sky/engine/core/rendering/RenderLayer.h
index 5fbbef54a0b6b28e8a095796bfea0baa09f86f15..3e69137e9fb9f69e4a4fc171dbdb3df43e169821 100644
--- a/sky/engine/core/rendering/RenderLayer.h
+++ b/sky/engine/core/rendering/RenderLayer.h
@@ -149,11 +149,8 @@ public:
     void convertToLayerCoords(const RenderLayer* ancestorLayer, LayoutPoint&) const;
     void convertToLayerCoords(const RenderLayer* ancestorLayer, LayoutRect&) const;
 
-    // The two main functions that use the layer system.  The paint method
-    // paints the layers that intersect the damage rect from back to
-    // front.  The hitTest method looks for mouse events by walking
+    // The hitTest method looks for mouse events by walking
     // layers that intersect the point from front to back.
-    bool hitTest(const HitTestRequest&, HitTestResult&);
     bool hitTest(const HitTestRequest&, const HitTestLocation&, HitTestResult&);
 
     // Pass offsetFromRoot if known.