Fix duplicate imports

Author: lunny

routers/web/repo/repo.go

@@ -22,7 +22,6 @@ import (
 	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/modules/storage"
 	"code.gitea.io/gitea/modules/web"
-	"code.gitea.io/gitea/services/archiver"
 	archiver_service "code.gitea.io/gitea/services/archiver"
 	"code.gitea.io/gitea/services/forms"
 	repo_service "code.gitea.io/gitea/services/repository"
@@ -374,7 +373,7 @@ func Download(ctx *context.Context) {
 	uri := ctx.Params("*")
 	aReq, err := archiver_service.NewRequest(ctx.Repo.Repository.ID, ctx.Repo.GitRepo, uri)
 	if err != nil {
-		if errors.Is(err, archiver.ErrUnknowArchiveFormat{}) {
+		if errors.Is(err, archiver_service.ErrUnknowArchiveFormat{}) {
 			ctx.Error(http.StatusBadRequest, err.Error())
 		} else {
 			ctx.ServerError("archiver_service.NewRequest", err)