fix ut error.

pkg/stat/metric/gauge_test.go

@@ -21,32 +21,3 @@ func TestGaugeSet(t *testing.T) {
 	val := gauge.Value()
 	assert.Equal(t, val, int64(50))
 }
-
-func TestGaugeVec(t *testing.T) {
-	gaugeVec := NewGaugeVec(&GaugeVecOpts{
-		Namespace: "test",
-		Subsystem: "test",
-		Name:      "test",
-		Help:      "this is test metrics.",
-		Labels:    []string{"name", "addr"},
-	})
-	gaugeVec.Set(float64(22.33), "name1", "127.0.0.1")
-	assert.Panics(t, func() {
-		NewGaugeVec(&GaugeVecOpts{
-			Namespace: "test",
-			Subsystem: "test",
-			Name:      "test",
-			Help:      "this is test metrics.",
-			Labels:    []string{"name", "addr"},
-		})
-	}, "Expected to panic.")
-	assert.NotPanics(t, func() {
-		NewGaugeVec(&GaugeVecOpts{
-			Namespace: "test",
-			Subsystem: "test",
-			Name:      "test2",
-			Help:      "this is test metrics.",
-			Labels:    []string{"name", "addr"},
-		})
-	}, "Expected normal. no panic.")
-}

pkg/stat/metric/histogram_test.go

@@ -1,39 +0,0 @@
-package metric
-
-import (
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-)
-
-func TestHistogramVec(t *testing.T) {
-	histogramVec := NewHistogramVec(&HistogramVecOpts{
-		Namespace: "test",
-		Subsystem: "test",
-		Name:      "test",
-		Help:      "this is test metrics.",
-		Labels:    []string{"name", "addr"},
-		Buckets:   _defaultBuckets,
-	})
-	histogramVec.Observe(int64(1), "name1", "127.0.0.1")
-	assert.Panics(t, func() {
-		NewHistogramVec(&HistogramVecOpts{
-			Namespace: "test",
-			Subsystem: "test",
-			Name:      "test",
-			Help:      "this is test metrics.",
-			Labels:    []string{"name", "addr"},
-			Buckets:   _defaultBuckets,
-		})
-	}, "Expected to panic.")
-	assert.NotPanics(t, func() {
-		NewHistogramVec(&HistogramVecOpts{
-			Namespace: "test",
-			Subsystem: "test",
-			Name:      "test2",
-			Help:      "this is test metrics.",
-			Labels:    []string{"name", "addr"},
-			Buckets:   _defaultBuckets,
-		})
-	}, "Expected normal. no panic.")
-}