First pass at removing dead vertical writing mode code.

sky/engine/core/rendering/line/BreakingContextInlineHeaders.h

Index: sky/engine/core/rendering/line/BreakingContextInlineHeaders.h
diff --git a/sky/engine/core/rendering/line/BreakingContextInlineHeaders.h b/sky/engine/core/rendering/line/BreakingContextInlineHeaders.h
index 62fdd956992fb287401d4552c9d31b29eff0251b..d7b02d616a3b765449054f79885bc5ed1bf1f19a 100644
--- a/sky/engine/core/rendering/line/BreakingContextInlineHeaders.h
+++ b/sky/engine/core/rendering/line/BreakingContextInlineHeaders.h
@@ -202,7 +202,7 @@ inline void setStaticPositions(RenderBlockFlow* block, RenderBox* child)
 
         // If |child| is a leading or trailing positioned object this is its only opportunity to ensure it moves with an inline
         // container changing width.
-        child->moveWithEdgeOfInlineContainerIfNecessary(child->isHorizontalWritingMode());
+        child->moveWithEdgeOfInlineContainerIfNecessary();
     }
     block->updateStaticInlinePositionForChild(child, blockHeight);
     child->layer()->setStaticBlockPosition(blockHeight);