Revert "Replace style sharing cousin list search with LRU"

Source/core/dom/Element.cpp

Index: Source/core/dom/Element.cpp
diff --git a/Source/core/dom/Element.cpp b/Source/core/dom/Element.cpp
index 1442d8c61c938ff29ff5a90bbc3e54ae1eb3b109..4c9f5eafbcd0df8c0128420a397e586ec0d3146a 100644
--- a/Source/core/dom/Element.cpp
+++ b/Source/core/dom/Element.cpp
@@ -1514,9 +1514,6 @@ bool Element::recalcStyle(StyleChange change)
             change = Force;
         else if (change != Force)
             change = localChange;
-    } else {
-        // We still want to seed the style sharing list when just walking the tree to maximize sharing.
-        document()->styleResolver()->addToStyleSharingList(this);
     }
     StyleResolverParentPusher parentPusher(this);