fix lint

Signed-off-by: SungJin1212 <tjdwls1201@gmail.com>

Author: SungJin1212

pkg/alertmanager/merger/v2_silences.go

@@ -4,7 +4,7 @@ import (
 	"errors"
 	"time"
 
-	"github.com/go-openapi/swag"
+	"github.com/go-openapi/swag/jsonutils"
 	v2 "github.com/prometheus/alertmanager/api/v2"
 	v2_models "github.com/prometheus/alertmanager/api/v2/models"
 )
@@ -18,7 +18,7 @@ func (V2Silences) MergeResponses(in [][]byte) ([]byte, error) {
 	silences := make(v2_models.GettableSilences, 0)
 	for _, body := range in {
 		parsed := make(v2_models.GettableSilences, 0)
-		if err := swag.ReadJSON(body, &parsed); err != nil {
+		if err := jsonutils.ReadJSON(body, &parsed); err != nil {
 			return nil, err
 		}
 		silences = append(silences, parsed...)
@@ -29,7 +29,7 @@ func (V2Silences) MergeResponses(in [][]byte) ([]byte, error) {
 		return nil, err
 	}
 
-	return swag.WriteJSON(merged)
+	return jsonutils.WriteJSON(merged)
 }
 
 func mergeV2Silences(in v2_models.GettableSilences) (v2_models.GettableSilences, error) {