Remove a bunch of dead code from RenderLayer

sky/engine/core/rendering/InlineFlowBox.cpp

Index: sky/engine/core/rendering/InlineFlowBox.cpp
diff --git a/sky/engine/core/rendering/InlineFlowBox.cpp b/sky/engine/core/rendering/InlineFlowBox.cpp
index 8a3c248f15313da00b9694a06fdc89f90bc59af7..d3bf1dbbafd8c239b7131884f9091df1b6885c0e 100644
--- a/sky/engine/core/rendering/InlineFlowBox.cpp
+++ b/sky/engine/core/rendering/InlineFlowBox.cpp
@@ -1205,10 +1205,9 @@ void InlineFlowBox::paintMask(PaintInfo& paintInfo, const LayoutPoint& paintOffs
 
     // Figure out if we need to push a transparency layer to render our mask.
     bool pushTransparencyLayer = false;
-    bool compositedMask = renderer().hasLayer() && boxModelObject()->layer()->hasCompositedMask();
     bool flattenCompositingLayers = renderer().view()->frameView() && renderer().view()->frameView()->paintBehavior() & PaintBehaviorFlattenCompositingLayers;
     CompositeOperator compositeOp = CompositeSourceOver;
-    if (!compositedMask || flattenCompositingLayers) {
+    if (flattenCompositingLayers) {
         if ((maskBoxImage && renderer().style()->maskLayers().hasImage()) || renderer().style()->maskLayers().next())
             pushTransparencyLayer = true;