Revert of Oilpan: Prepare to move RenderObject and RenderObjectChildList to Oilpan heap.

Source/core/rendering/RenderTableSection.cpp

Index: Source/core/rendering/RenderTableSection.cpp
diff --git a/Source/core/rendering/RenderTableSection.cpp b/Source/core/rendering/RenderTableSection.cpp
index ddfe5198ff651aff5a8cf6747aea1244fca71d17..60ad60b407346efcd55964c660e96dc67e93985f 100644
--- a/Source/core/rendering/RenderTableSection.cpp
+++ b/Source/core/rendering/RenderTableSection.cpp
@@ -95,12 +95,6 @@
 
 RenderTableSection::~RenderTableSection()
 {
-}
-
-void RenderTableSection::trace(Visitor* visitor)
-{
-    visitor->trace(m_children);
-    RenderBox::trace(visitor);
 }
 
 void RenderTableSection::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)