Remove some dead code from rendering/ folder

Source/core/rendering/RenderFrameSet.cpp

Index: Source/core/rendering/RenderFrameSet.cpp
diff --git a/Source/core/rendering/RenderFrameSet.cpp b/Source/core/rendering/RenderFrameSet.cpp
index 01744824dd9a15b43838825ae532f3c250d66883..779fd4246649157295ca87512df05159b3e57b7c 100644
--- a/Source/core/rendering/RenderFrameSet.cpp
+++ b/Source/core/rendering/RenderFrameSet.cpp
@@ -597,16 +597,6 @@ void RenderFrameSet::setIsResizing(bool isResizing)
         frame->eventHandler().setResizingFrameSet(isResizing ? frameSet() : 0);
 }
 
-bool RenderFrameSet::isResizingRow() const
-{
-    return m_isResizing && m_rows.m_splitBeingResized != noSplit;
-}
-
-bool RenderFrameSet::isResizingColumn() const
-{
-    return m_isResizing && m_cols.m_splitBeingResized != noSplit;
-}
-
 bool RenderFrameSet::canResizeRow(const IntPoint& p) const
 {
     int r = hitTestSplit(m_rows, p.y());