Revert of [heap] Fine-grained JSArrayBuffer tracking

src/heap/scavenger.cc

Index: src/heap/scavenger.cc
diff --git a/src/heap/scavenger.cc b/src/heap/scavenger.cc
index d7c3f2b9d0538878a2928b4b8ed51acc485a5fe3..1d785d08d24232388be4d45603d68f9da313c22a 100644
--- a/src/heap/scavenger.cc
+++ b/src/heap/scavenger.cc
@@ -295,13 +295,7 @@
     DCHECK(map_word.IsForwardingAddress());
     HeapObject* target = map_word.ToForwardingAddress();
     if (!heap->InNewSpace(target)) {
-      heap->array_buffer_tracker()->Promote(
-          JSArrayBuffer::cast(target),
-          reinterpret_cast<JSArrayBuffer*>(object));
-    } else {
-      heap->array_buffer_tracker()->SemiSpaceCopy(
-          JSArrayBuffer::cast(target),
-          reinterpret_cast<JSArrayBuffer*>(object));
+      heap->array_buffer_tracker()->Promote(JSArrayBuffer::cast(target));
     }
   }