Remove stale cleanup leftovers

internal/bundle/discover.go

@@ -35,7 +35,7 @@ func Discover(ctx context.Context, backend storage.Backend, sourceRoot string) (
 	}
 	sort.Strings(roots)
 	if len(roots) == 0 {
-		return nil, fmt.Errorf("no bundles found under %q", displayRoot(sourceRoot))
+		return nil, fmt.Errorf("no bundles found under %q", storage.DisplayPath(sourceRoot))
 	}
 	if err := rejectNestedRoots(roots); err != nil {
 		return nil, err
@@ -57,7 +57,7 @@ func rejectNestedRoots(roots []string) error {
 	for index, root := range roots {
 		for _, candidate := range roots[index+1:] {
 			if isAncestor(root, candidate) {
-				return fmt.Errorf("nested manifest %q under bundle %q", displayRoot(candidate), displayRoot(root))
+				return fmt.Errorf("nested manifest %q under bundle %q", storage.DisplayPath(candidate), storage.DisplayPath(root))
 			}
 		}
 	}