diff --git a/storage/series.go b/storage/series.go
index 43c519e38d..2fff56785a 100644
--- a/storage/series.go
+++ b/storage/series.go
@@ -22,7 +22,6 @@ import (
 	"github.com/prometheus/prometheus/model/labels"
 	"github.com/prometheus/prometheus/tsdb/chunkenc"
 	"github.com/prometheus/prometheus/tsdb/chunks"
-	"github.com/prometheus/prometheus/util/annotations"
 )
 
 type SeriesEntry struct {
@@ -226,34 +225,6 @@ func (it *listChunkSeriesIterator) Next() bool {
 
 func (*listChunkSeriesIterator) Err() error { return nil }
 
-type listSeriesSet struct {
-	series []Series
-
-	curr int
-}
-
-// NewListSeriesSet lists []storage.Series as SeriesSet.
-func NewListSeriesSet(series []Series) SeriesSet {
-	return &listSeriesSet{series: series, curr: -1}
-}
-
-func (s *listSeriesSet) Next() bool {
-	if s.curr >= len(s.series)-1 {
-		return false
-	}
-	s.curr++
-	return true
-}
-
-func (s *listSeriesSet) At() Series {
-	// Series composed of same chunks for the same series.
-	return s.series[s.curr]
-}
-
-func (listSeriesSet) Err() error { return nil }
-
-func (listSeriesSet) Warnings() annotations.Annotations { return nil }
-
 type chunkSetToSeriesSet struct {
 	ChunkSeriesSet