Revert of [strong] Object literals create strong objects

src/parser.cc

Index: src/parser.cc
diff --git a/src/parser.cc b/src/parser.cc
index 6708ace8cbd56216aaf6d2b4f3aa59d606e04306..87a74a4c7bba3c56ae7da85c8d565dd1292c5bbf 100644
--- a/src/parser.cc
+++ b/src/parser.cc
@@ -5569,12 +5569,11 @@
     ZoneList<Expression*>* args = new (zone()) ZoneList<Expression*>(4, zone());
     args->Add(factory()->NewArrayLiteral(
                   const_cast<ZoneList<Expression*>*>(cooked_strings),
-                  cooked_idx, is_strong(language_mode()), pos),
+                  cooked_idx, pos),
               zone());
     args->Add(
         factory()->NewArrayLiteral(
-            const_cast<ZoneList<Expression*>*>(raw_strings), raw_idx,
-            is_strong(language_mode()), pos),
+            const_cast<ZoneList<Expression*>*>(raw_strings), raw_idx, pos),
         zone());
 
     // Ensure hash is suitable as a Smi value
@@ -5665,7 +5664,6 @@
         }
         int literal_index = function_state_->NextMaterializedLiteralIndex();
         args->Add(factory()->NewArrayLiteral(unspread, literal_index,
-                                             is_strong(language_mode()),
                                              RelocInfo::kNoPosition),
                   zone());