improve(rebalancer): Suppress warning about deposit with message (#2066)

src/relayer/Relayer.ts

@@ -938,7 +938,7 @@ export class Relayer {
     // Verify that the _original_ message was empty, since that's what would be used in a slow fill. If a non-empty
     // message was nullified by an update, it can be full-filled but preferably not automatically zero-filled.
     if (!isMessageEmpty(deposit.message)) {
-      this.logger.warn({
+      this.logger[this.config.sendingRelaysEnabled ? "warn" : "debug"]({
         at: "Relayer::requestSlowFill",
         message: "Suppressing slow fill request for deposit with message.",
         deposit,