Remove now-unnecessary VectorTraits specializations.

Source/core/rendering/RenderTableSection.h

 /*
  * Copyright (C) 1997 Martin Jones (mjones@kde.org)
  *           (C) 1997 Torben Weis (weis@kde.org)
  *           (C) 1998 Waldo Bastian (bastian@kde.org)
  *           (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2009, 2013 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 306 matching lines @@
 
     // This map holds the collapsed border values for cells with collapsed borders.
     // It is held at RenderTableSection level to spare memory consumption by table cells.
     WillBeHeapHashMap<pair<RawPtrWillBeMember<const RenderTableCell>, int>, CollapsedBorderValue > m_cellsCollapsedBorders;
 };
 
 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderTableSection, isTableSection());
 
 } // namespace blink
 
+#if ENABLE(OILPAN)
 namespace WTF {
 
-#if ENABLE(OILPAN)
-template<> struct VectorTraits<blink::RenderTableSection::CellStruct> : VectorTraitsBase<blink::RenderTableSection::CellStruct> {
-    static const bool needsDestruction = false;
-};
 template<> struct VectorTraits<blink::RenderTableSection::RowStruct> : VectorTraitsBase<blink::RenderTableSection::RowStruct> {
     static const bool needsDestruction = false;
 };
+
+} // namespace WTF
 #endif
 
-}
-
 #endif // RenderTableSection_h