Reland "[turbofan] Discard the shared code entry in the optimized code map."

src/heap/heap.cc

Index: src/heap/heap.cc
diff --git a/src/heap/heap.cc b/src/heap/heap.cc
index 2f41f83747eb5e31d064679fc09ca9e9d8d134b7..1ab4d2e85b300400445eed38bf4c80414efef102 100644
--- a/src/heap/heap.cc
+++ b/src/heap/heap.cc
@@ -2826,14 +2826,6 @@ void Heap::CreateInitialObjects() {
     Handle<WeakCell> cell = factory->NewWeakCell(factory->undefined_value());
     set_empty_weak_cell(*cell);
     cell->clear();
-
-    Handle<FixedArray> cleared_optimized_code_map =
-        factory->NewFixedArray(SharedFunctionInfo::kEntriesStart, TENURED);
-    cleared_optimized_code_map->set(SharedFunctionInfo::kSharedCodeIndex,
-                                    *cell);
-    STATIC_ASSERT(SharedFunctionInfo::kEntriesStart == 1 &&
-                  SharedFunctionInfo::kSharedCodeIndex == 0);
-    set_cleared_optimized_code_map(*cleared_optimized_code_map);
   }
 
   set_detached_contexts(empty_fixed_array());