Revert "Captured arguments object materialization"

src/heap.h

Index: src/heap.h
diff --git a/src/heap.h b/src/heap.h
index 2a95082297ba2b51b50c38a18eeb108cee2c4041..c9101bea9f71687ff9c73f559f081fddc2f137c0 100644
--- a/src/heap.h
+++ b/src/heap.h
@@ -201,8 +201,7 @@ namespace internal {
   V(Symbol, elements_transition_symbol, ElementsTransitionSymbol)              \
   V(SeededNumberDictionary, empty_slow_element_dictionary,                     \
       EmptySlowElementDictionary)                                              \
-  V(Symbol, observed_symbol, ObservedSymbol)                                   \
-  V(FixedArray, materialized_objects, MaterializedObjects)
+  V(Symbol, observed_symbol, ObservedSymbol)
 
 #define ROOT_LIST(V)                                  \
   STRONG_ROOT_LIST(V)                                 \
@@ -1368,10 +1367,6 @@ class Heap {
     roots_[kStoreBufferTopRootIndex] = reinterpret_cast<Smi*>(top);
   }
 
-  void public_set_materialized_objects(FixedArray* objects) {
-    roots_[kMaterializedObjectsRootIndex] = objects;
-  }
-
   // Generated code can embed this address to get access to the roots.
   Object** roots_array_start() { return roots_; }