diff --git a/metrics/sample_test.go b/metrics/sample_test.go
index 7967357055..9835ec1c30 100644
--- a/metrics/sample_test.go
+++ b/metrics/sample_test.go
@@ -87,13 +87,6 @@ func BenchmarkUniformSample1028(b *testing.B) {
 	benchmarkSample(b, NewUniformSample(1028))
 }
 
-func min(a, b int) int {
-	if a < b {
-		return a
-	}
-	return b
-}
-
 func TestExpDecaySample(t *testing.T) {
 	for _, tc := range []struct {
 		reservoirSize int