Remove wrong commented out code from RenderLayer::updateLayerPositionsAfterScroll

Source/core/rendering/RenderLayer.h

 /*
  * Copyright (C) 2003, 2009, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Intel Corporation. All rights reserved.
  *
  * Portions are Copyright (C) 1998 Netscape Communications Corporation.
  *
  * Other contributors:
  *   Robert O'Callahan <roc+@cs.cmu.edu>
  *   David Baron <dbaron@fas.harvard.edu>
  *   Christian Biesinger <cbiesinger@web.de>
@@ skipping 631 matching lines @@
 
     unsigned m_isPaginated : 1; // If we think this layer is split by a multi-column ancestor, then this bit will be set.
 
     unsigned m_3DTransformedDescendantStatusDirty : 1;
     // Set on a stacking context layer that has 3D descendants anywhere
     // in a preserves3D hierarchy. Hint to do 3D-aware hit testing.
     unsigned m_has3DTransformedDescendant : 1;
 
     unsigned m_containsDirtyOverlayScrollbars : 1;
 
-    // This is an optimization added for <table>.
-    // Currently cells do not need to update their repaint rectangles when scrolling. This also
-    // saves a lot of time when scrolling on a table.
-    const unsigned m_canSkipRepaintRectsUpdateOnScroll : 1;
-
     unsigned m_hasFilterInfo : 1;
     unsigned m_needsCompositingInputsUpdate : 1;
     unsigned m_childNeedsCompositingInputsUpdate : 1;
 
     // Used only while determining what layers should be composited. Applies to the tree of z-order lists.
     unsigned m_hasCompositingDescendant : 1;
 
     // Applies to the real render layer tree (i.e., the tree determined by the layer's parent and children and
     // as opposed to the tree formed by the z-order and normal flow lists).
     unsigned m_hasNonCompositedChild : 1;
@@ skipping 64 matching lines @@
 
 } // namespace WebCore
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 void showLayerTree(const WebCore::RenderLayer*);
 void showLayerTree(const WebCore::RenderObject*);
 #endif
 
 #endif // RenderLayer_h