Remove some unused variable assignments

Source/core/rendering/RenderListItem.cpp

 /**
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Andrew Wellington (proton@wiretapped.net)
  *
  * 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 340 matching lines @@
                     newLogicalLayoutOverflowRect.setWidth(newLogicalLayoutOverflowRect.maxX() - markerLogicalLeft);
                     newLogicalLayoutOverflowRect.setX(markerLogicalLeft);
                     if (box == root)
                         adjustOverflow = true;
                 }
                 box->setOverflowFromLogicalRects(newLogicalLayoutOverflowRect, newLogicalVisualOverflowRect, lineTop, lineBottom);
                 if (box->boxModelObject()->hasSelfPaintingLayer())
                     hitSelfPaintingLayer = true;
             }
         } else {
-            markerLogicalLeft = m_marker->logicalLeft() + paddingStart() + borderStart() + m_marker->marginEnd();
             LayoutUnit rightLineOffset = logicalRightOffsetForLine(blockOffset, logicalRightOffsetForLine(blockOffset, false), false);
             markerLogicalLeft = rightLineOffset - lineOffset + paddingStart() + borderStart() + m_marker->marginEnd();
             m_marker->inlineBoxWrapper()->adjustLineDirectionPosition(markerLogicalLeft - markerOldLogicalLeft);
             for (InlineFlowBox* box = m_marker->inlineBoxWrapper()->parent(); box; box = box->parent()) {
                 LayoutRect newLogicalVisualOverflowRect = box->logicalVisualOverflowRect(lineTop, lineBottom);
                 LayoutRect newLogicalLayoutOverflowRect = box->logicalLayoutOverflowRect(lineTop, lineBottom);
                 if (markerLogicalLeft + m_marker->logicalWidth() > newLogicalVisualOverflowRect.maxX() && !hitSelfPaintingLayer) {
                     newLogicalVisualOverflowRect.setWidth(markerLogicalLeft + m_marker->logicalWidth() - newLogicalVisualOverflowRect.x());
                     if (box == root)
                         adjustOverflow = true;
@@ skipping 132 matching lines @@
             // assume that all the following ones have too.
             // This gives us the opportunity to stop here and avoid
             // marking the same nodes again.
             break;
         }
         item->updateValue();
     }
 }
 
 } // namespace WebCore