Remove unnecessary warning

The user chooses not to provide eth node therefore they are expected to
understand the consequences. Also, there is already an error message is
someone tries to request `starknet_getMessageStatus` without providing
an eth-node.

node/node.go

@@ -286,8 +286,6 @@ func New(cfg *Config, version string) (*Node, error) { //nolint:gocyclo,funlen
 		}
 		n.services = append(n.services, l1Client)
 		rpcHandler.WithL1Client(l1Client.L1())
-	} else {
-		n.log.Warnw("L1 client not found, cannot serve starknet_getMessage RPC endpoint")
 	}
 
 	if semversion, err := semver.NewVersion(version); err == nil {