fix: disable batch-poster check while enable external signer

Author: incubator4

cmd/nitro/nitro.go

@@ -249,7 +249,7 @@ func mainImpl() int {
 	// If sequencer and signing is enabled or batchposter is enabled without
 	// external signing sequencer will need a key.
 	sequencerNeedsKey := (nodeConfig.Node.Sequencer && !nodeConfig.Node.Feed.Output.DisableSigning) ||
-		(nodeConfig.Node.BatchPoster.Enable && (nodeConfig.Node.BatchPoster.DataPoster.ExternalSigner.URL == "" || nodeConfig.Node.DataAvailability.Enable))
+		(nodeConfig.Node.BatchPoster.Enable && (nodeConfig.Node.BatchPoster.DataPoster.ExternalSigner.URL == ""))
 	validatorNeedsKey := nodeConfig.Node.Staker.OnlyCreateWalletContract ||
 		(nodeConfig.Node.Staker.Enable && !strings.EqualFold(nodeConfig.Node.Staker.Strategy, "watchtower") && nodeConfig.Node.Staker.DataPoster.ExternalSigner.URL == "")