vm: Remove unused ActorBalance

chain/store/store.go

@@ -119,7 +119,7 @@ type ChainStore struct {
 	reorgCh        chan<- reorg
 	reorgNotifeeCh chan ReorgNotifee
 
-	mmCache *lru.ARCCache
+	mmCache *lru.ARCCache // msg meta cache (mh.Messages -> secp, bls []cid)
 	tsCache *lru.ARCCache
 
 	evtTypes [1]journal.EventType

chain/vm/invoker.go

@@ -228,7 +228,7 @@ func DumpActorState(act *types.Actor, b []byte) (interface{}, error) {
 		return nil, nil
 	}
 
-	i := NewActorRegistry() // TODO: register builtins in init block
+	i := NewActorRegistry()
 
 	actInfo, ok := i.actors[act.Code]
 	if !ok {

chain/vm/vm.go

@@ -641,15 +641,6 @@ func (vm *VM) ShouldBurn(ctx context.Context, st *state.StateTree, msg *types.Me
 	return true, nil
 }
 
-func (vm *VM) ActorBalance(addr address.Address) (types.BigInt, aerrors.ActorError) {
-	act, err := vm.cstate.GetActor(addr)
-	if err != nil {
-		return types.EmptyInt, aerrors.Absorb(err, 1, "failed to find actor")
-	}
-
-	return act.Balance, nil
-}
-
 type vmFlushKey struct{}
 
 func (vm *VM) Flush(ctx context.Context) (cid.Cid, error) {