server: remove shouldPeerBootstrap

We already set `nobootstrap` in the default node flags for itest nodes,
so we can remove this check now. This will allow us to later test
bootstrapping in an itest. NOTE that with this change, any
signet/simnet/regtest network users will now need to explicitly add the
`--nobootstrap` flag if they want to prevent automatic bootstrapping.
This warning is added to the release notes later on.

Author: ellemouton

server.go

@@ -2644,7 +2644,7 @@ func (s *server) Start(ctx context.Context) error {
 		// configure the set of active bootstrappers, and launch a
 		// dedicated goroutine to maintain a set of persistent
 		// connections.
-		if shouldPeerBootstrap(s.cfg) {
+		if !s.cfg.NoNetBootstrap {
 			bootstrappers, err := initNetworkBootstrappers(s)
 			if err != nil {
 				startErr = err
@@ -5378,20 +5378,6 @@ func newSweepPkScriptGen(
 	}
 }
 
-// shouldPeerBootstrap returns true if we should attempt to perform peer
-// bootstrapping to actively seek our peers using the set of active network
-// bootstrappers.
-func shouldPeerBootstrap(cfg *Config) bool {
-	isSimnet := cfg.Bitcoin.SimNet
-	isSignet := cfg.Bitcoin.SigNet
-	isRegtest := cfg.Bitcoin.RegTest
-	isDevNetwork := isSimnet || isSignet || isRegtest
-
-	// TODO(yy): remove the check on simnet/regtest such that the itest is
-	// covering the bootstrapping process.
-	return !cfg.NoNetBootstrap && !isDevNetwork
-}
-
 // fetchClosedChannelSCIDs returns a set of SCIDs that have their force closing
 // finished.
 func (s *server) fetchClosedChannelSCIDs() map[lnwire.ShortChannelID]struct{} {