chore: clean up todo comment

There is debug logging of record counts right above this line, users can
enable debug logging to see how many records are being processed and
decide what actions to take with regards to filtering/api rate limiting.

pkg/exporter/exporter.go

@@ -158,7 +158,6 @@ func (w *Worker) RefreshQPSRecordData() {
 		numRecords += len(z.Records)
 	}
 	level.Debug(w.logger).Log("msg", "updating worker qps cache", "zone_count", len(w.zoneCache), "record_count", fmt.Sprintf("%d", numRecords))
-	// TODO: this may be a good place to log a warning if a user has a crap ton of records and we're worried about api calls or anything
 
 	var cache []*ns1_internal.QPS