Cleanup: Get rid of LayoutBlock::offsetFromLogicalTopOfFirstPage().

Source/core/layout/LayoutBlock.h

Index: Source/core/layout/LayoutBlock.h
diff --git a/Source/core/layout/LayoutBlock.h b/Source/core/layout/LayoutBlock.h
index 67b040080b73063d58ee5f9e854cd31ce098a190..b8c444ecf28fdd624242363aec25d6b5794096f1 100644
--- a/Source/core/layout/LayoutBlock.h
+++ b/Source/core/layout/LayoutBlock.h
@@ -449,10 +449,6 @@ protected:
 
     virtual bool canCollapseAnonymousBlockChild() const { return true; }
 
-public:
-    virtual LayoutUnit offsetFromLogicalTopOfFirstPage() const override final;
-
-protected:
     LayoutObjectChildList m_children;
     LineBoxList m_lineBoxes; // All of the root line boxes created for this block flow.  For example, <div>Hello<br>world.</div> will have two total lines for the <div>.