Revert of [heap] Add optimized RecordWrites

src/heap/heap-inl.h

Index: src/heap/heap-inl.h
diff --git a/src/heap/heap-inl.h b/src/heap/heap-inl.h
index df9072e78020dc07f3658f4a50ff1febb4b7d049..7b2f5ead9b9a3ff53617f12212ebdfe253f99eac 100644
--- a/src/heap/heap-inl.h
+++ b/src/heap/heap-inl.h
@@ -399,20 +399,9 @@
   if (!InNewSpace(o) || !object->IsHeapObject() || InNewSpace(object)) {
     return;
   }
-  RememberedSet<OLD_TO_NEW>::Insert(
-      Page::FromAddress(reinterpret_cast<Address>(object)),
-      HeapObject::cast(object)->address() + offset);
-}
-
-void Heap::RecordFixedArrayElements(FixedArray* array, int offset, int length) {
-  if (InNewSpace(array)) return;
-  Page* page = Page::FromAddress(reinterpret_cast<Address>(array));
-  for (int i = 0; i < length; i++) {
-    if (!InNewSpace(array->get(i))) continue;
-    RememberedSet<OLD_TO_NEW>::Insert(
-        page,
-        reinterpret_cast<Address>(array->RawFieldOfElementAt(offset + i)));
-  }
+  Page* page = Page::FromAddress(reinterpret_cast<Address>(object));
+  Address slot = HeapObject::cast(object)->address() + offset;
+  RememberedSet<OLD_TO_NEW>::Insert(page, slot);
 }