fix minor lint issue + use labels Range function since it looks like

the tests fail to do `range labels.Labels` on CI

Signed-off-by: Callum Styan <callumstyan@gmail.com>
Signed-off-by: Nicolás Pazos <npazosmendez@gmail.com>

storage/remote/queue_manager.go

@@ -26,7 +26,6 @@ import (
 	"github.com/go-kit/log"
 	"github.com/go-kit/log/level"
 	"github.com/gogo/protobuf/proto"
-
 	"github.com/golang/snappy"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/common/model"
@@ -1474,7 +1473,6 @@ func (s *shards) runShard(ctx context.Context, shardID int, queue *queue) {
 					s.sendMinLenSamples(ctx, pendingMinLenData[:n], symbolTable.LabelsData(), nPendingSamples, nPendingExemplars, nPendingHistograms, pBuf, &buf)
 					symbolTable.clear()
 				}
-
 			}
 			queue.ReturnForReuse(batch)
 			timer.Reset(time.Duration(s.qm.cfg.BatchSendDeadline))

storage/remote/queue_manager_test.go

@@ -1433,9 +1433,9 @@ func createDummyTimeSeries(instances int) []timeSeries {
 		b := labels.NewBuilder(commonLabels)
 		b.Set("pod", "prometheus-"+strconv.Itoa(i))
 		for _, lbls := range metrics {
-			for _, l := range lbls {
+			lbls.Range(func(l labels.Label) {
 				b.Set(l.Name, l.Value)
-			}
+			})
 			result = append(result, timeSeries{
 				seriesLabels: b.Labels(),
 				value:        r.Float64(),