Fix lint issue caused by merge

Author: harryzcy

models/repo/topic.go

@@ -268,7 +268,7 @@ func AddTopic(repoID int64, topicName string) (*Topic, error) {
 }
 
 func AddTopics(repoID int64, topicNames ...string) error {
-	ctx, committer, err := db.TxContext()
+	ctx, committer, err := db.TxContext(db.DefaultContext)
 	if err != nil {
 		return err
 	}

services/migrations/migrate.go

@@ -502,7 +502,7 @@ func SyncRepository(ctx context.Context, doer *user_model.User, ownerName string
 		if err1 := uploader.Rollback(); err1 != nil {
 			log.Error("rollback failed: %v", err1)
 		}
-		if err2 := admin_model.CreateRepositoryNotice(fmt.Sprintf("Syncing repository from %s failed: %v", opts.OriginalURL, err)); err2 != nil {
+		if err2 := system_model.CreateRepositoryNotice(fmt.Sprintf("Syncing repository from %s failed: %v", opts.OriginalURL, err)); err2 != nil {
 			log.Error("create repository notice failed: ", err2)
 		}
 		return nil, err