Fix gosimple issues (#17179)

Signed-off-by: Mario Trangoni <mjtrangoni@gmail.com>

pkg/services/alerting/notifiers/discord.go

@@ -171,7 +171,7 @@ func (this *DiscordNotifier) embedImage(cmd *models.SendWebhookSync, imagePath s
 
 	w.Close()
 
-	cmd.Body = string(b.Bytes())
+	cmd.Body = b.String()
 	cmd.ContentType = w.FormDataContentType()
 
 	return nil

pkg/services/alerting/notifiers/victorops.go

@@ -92,7 +92,7 @@ func (vn *VictoropsNotifier) Notify(evalContext *alerting.EvalContext) error {
 		messageType = alertStateRecovery
 	}
 
-	fields := make(map[string]interface{}, 0)
+	fields := make(map[string]interface{})
 	fieldLimitCount := 4
 	for index, evt := range evalContext.EvalMatches {
 		fields[evt.Metric] = evt.Value

pkg/services/sqlstore/login_attempt.go

@@ -43,7 +43,7 @@ func DeleteOldLoginAttempts(cmd *m.DeleteOldLoginAttemptsCommand) error {
 		if err != nil {
 			return err
 		}
-
+		// nolint: gosimple
 		if result == nil || len(result) == 0 || result[0] == nil {
 			return nil
 		}