opt: fix duplicate check exitcode

chain/consensus/compute_state.go

@@ -146,9 +146,6 @@ func (t *TipSetExecutor) ApplyBlocks(ctx context.Context,
 				return xerrors.Errorf("callback failed on cron message: %w", err)
 			}
 		}
-		if ret.ExitCode != 0 {
-			return xerrors.Errorf("cron exit was non-zero: %d", ret.ExitCode)
-		}
 
 		return nil
 	}

chain/consensus/filcns/filecoin.go

@@ -91,9 +91,6 @@ var RewardFunc = func(ctx context.Context, vmi vm.Interface, em stmgr.ExecMonito
 		}
 	}
 
-	if ret.ExitCode != 0 {
-		return xerrors.Errorf("reward application message failed (exit %d): %s", ret.ExitCode, ret.ActorErr)
-	}
 	return nil
 }