TSDB: move function only used in tests

Signed-off-by: Bryan Boreham <bjboreham@gmail.com>

tsdb/block_test.go

@@ -209,6 +209,22 @@ func TestCorruptedChunk(t *testing.T) {
 	}
 }
 
+func sequenceFiles(dir string) ([]string, error) {
+	files, err := os.ReadDir(dir)
+	if err != nil {
+		return nil, err
+	}
+	var res []string
+
+	for _, fi := range files {
+		if _, err := strconv.ParseUint(fi.Name(), 10, 64); err != nil {
+			continue
+		}
+		res = append(res, filepath.Join(dir, fi.Name()))
+	}
+	return res, nil
+}
+
 func TestLabelValuesWithMatchers(t *testing.T) {
 	tmpdir := t.TempDir()
 	ctx := context.Background()

tsdb/db.go

@@ -24,7 +24,6 @@ import (
 	"os"
 	"path/filepath"
 	"slices"
-	"strconv"
 	"strings"
 	"sync"
 	"time"
@@ -2209,22 +2208,6 @@ func blockDirs(dir string) ([]string, error) {
 	return dirs, nil
 }
 
-func sequenceFiles(dir string) ([]string, error) {
-	files, err := os.ReadDir(dir)
-	if err != nil {
-		return nil, err
-	}
-	var res []string
-
-	for _, fi := range files {
-		if _, err := strconv.ParseUint(fi.Name(), 10, 64); err != nil {
-			continue
-		}
-		res = append(res, filepath.Join(dir, fi.Name()))
-	}
-	return res, nil
-}
-
 func exponential(d, min, max time.Duration) time.Duration {
 	d *= 2
 	if d < min {