Remove more dead code from accessibility/ folder

Source/core/accessibility/AXTable.cpp

 /*
  * Copyright (C) 2008 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 438 matching lines @@
     return m_columns.size();
 }
 
 unsigned AXTable::rowCount()
 {
     updateChildrenIfNecessary();
 
     return m_rows.size();
 }
 
-int AXTable::tableLevel() const
-{
-    int level = 0;
-    for (AXObject* obj = static_cast<AXObject*>(const_cast<AXTable*>(this)); obj; obj = obj->parentObject()) {
-        if (obj->isAXTable())
-            ++level;
-    }
-
-    return level;
-}
-
 AXTableCell* AXTable::cellForColumnAndRow(unsigned column, unsigned row)
 {
     updateChildrenIfNecessary();
     if (column >= columnCount() || row >= rowCount())
         return 0;
 
     // Iterate backwards through the rows in case the desired cell has a rowspan and exists in a previous row.
     for (unsigned rowIndexCounter = row + 1; rowIndexCounter > 0; --rowIndexCounter) {
         unsigned rowIndex = rowIndexCounter - 1;
         AccessibilityChildrenVector children = m_rows[rowIndex]->children();
@@ skipping 61 matching lines @@
     }
 
     // try the standard
     if (title.isEmpty())
         title = AXRenderObject::title();
 
     return title;
 }
 
 } // namespace WebCore