prune: no longer disable automatic index updates

this allows prune to resume an interrupted prune run.

internal/repository/repository.go

@@ -42,8 +42,6 @@ type Repository struct {
 
 	opts Options
 
-	noAutoIndexUpdate bool
-
 	packerWg *errgroup.Group
 	uploader *packerUploader
 	treePM   *packerManager
@@ -130,12 +128,6 @@ func New(be backend.Backend, opts Options) (*Repository, error) {
 	return repo, nil
 }
 
-// DisableAutoIndexUpdate deactives the automatic finalization and upload of new
-// indexes once these are full
-func (r *Repository) DisableAutoIndexUpdate() {
-	r.noAutoIndexUpdate = true
-}
-
 // setConfig assigns the given config and updates the repository parameters accordingly
 func (r *Repository) setConfig(cfg restic.Config) {
 	r.cfg = cfg
@@ -526,10 +518,6 @@ func (r *Repository) Flush(ctx context.Context) error {
 		return err
 	}
 
-	// Save index after flushing only if noAutoIndexUpdate is not set
-	if r.noAutoIndexUpdate {
-		return nil
-	}
 	return r.idx.SaveIndex(ctx, r)
 }