Remove some dead code from rendering/ folder

Source/core/rendering/RenderFrameSet.cpp

 /**
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Simon Hausmann <hausmann@kde.org>
  *           (C) 2000 Stefan Schimanski (1Stein@gmx.de)
  * Copyright (C) 2004, 2005, 2006 Apple Computer, Inc.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 579 matching lines @@
 {
     m_isResizing = isResizing;
     for (RenderObject* ancestor = parent(); ancestor; ancestor = ancestor->parent()) {
         if (ancestor->isFrameSet())
             toRenderFrameSet(ancestor)->m_isChildResizing = isResizing;
     }
     if (LocalFrame* frame = this->frame())
         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());
     return r != noSplit && !m_rows.m_preventResize[r];
 }
 
 bool RenderFrameSet::canResizeColumn(const IntPoint& p) const
 {
     int c = hitTestSplit(m_cols, p.x());
     return c != noSplit && !m_cols.m_preventResize[c];
@@ skipping 51 matching lines @@
         return SetCursor;
     }
     if (canResizeColumn(roundedPoint)) {
         cursor = columnResizeCursor();
         return SetCursor;
     }
     return RenderBox::getCursor(point, cursor);
 }
 
 } // namespace WebCore