Enable --verify-heap in release mode

src/objects-debug.cc

Index: src/objects-debug.cc
diff --git a/src/objects-debug.cc b/src/objects-debug.cc
index 6195bf58cd6c154c54efa8f1ebca52e24819e33f..6b2f9d1ca578cd2d975bd6422ca985c5fad1e2ac 100644
--- a/src/objects-debug.cc
+++ b/src/objects-debug.cc
@@ -1002,23 +1002,6 @@ void NormalizedMapCache::NormalizedMapCacheVerify() {
   }
 }
 
-
-void Map::ZapTransitions() {
-  TransitionArray* transition_array = transitions();
-  MemsetPointer(transition_array->data_start(),
-                GetHeap()->the_hole_value(),
-                transition_array->length());
-}
-
-
-void Map::ZapPrototypeTransitions() {
-  FixedArray* proto_transitions = GetPrototypeTransitions();
-  MemsetPointer(proto_transitions->data_start(),
-                GetHeap()->the_hole_value(),
-                proto_transitions->length());
-}
-
-
 #endif  // DEBUG
 
 } }  // namespace v8::internal