minor code cleanup

main.go

@@ -58,9 +58,8 @@ func (m UploadManager) Upload() (float64, error) {
 			return 0, err
 		}
 		return float64(up), nil
-	} else {
-		return 0, fmt.Errorf("could not parse bandwidth from tc")
 	}
+	return 0, fmt.Errorf("could not parse bandwidth from tc")
 }
 
 func (m UploadManager) SetUpload(upload float64) (float64, error) {
@@ -102,10 +101,9 @@ func doPing(host string, count int, interval time.Duration) (*ping.Statistics, e
 	for _, addr := range addrs {
 		if addr.(*net.IPNet).IP.To4() == nil {
 			continue
-		} else {
-			pinger.Source = addr.(*net.IPNet).IP.String()
-			break
 		}
+		pinger.Source = addr.(*net.IPNet).IP.String()
+		break
 	}
 
 	if pinger.Source == "" {
@@ -118,7 +116,7 @@ func doPing(host string, count int, interval time.Duration) (*ping.Statistics, e
 	}
 	log.Debugf("[PING] %s: %s±%s %d%% loss", host, pinger.Statistics().AvgRtt, pinger.Statistics().StdDevRtt,
 		int(pinger.Statistics().PacketLoss))
-	if pinger.Statistics().PacketLoss == 100 {
+	if pinger.Statistics().PacketLoss == 100 { //nolint:gomnd
 		return nil, ErrorNoResponse
 	}
 	return pinger.Statistics(), nil