removed a function as it's no longer relevant

Signed-off-by: Xiaoxuan Wang <[email protected]>

content/oci/deletableoci.go

@@ -280,7 +280,7 @@ func (ds *DeletableStore) loadIndexFile(ctx context.Context) error {
 		return fmt.Errorf("failed to decode index file: %w", err)
 	}
 	ds.index = &index
-	return loadIndexIntoMemory(ctx, ds.index, ds.storage, ds.tagResolver, ds.graph)
+	return loadIndex(ctx, ds.index, ds.storage, ds.tagResolver, ds.graph)
 }
 
 // SaveIndex writes the `index.json` file to the file system.
@@ -334,22 +334,3 @@ func (ds *DeletableStore) writeIndexFile() error {
 	}
 	return os.WriteFile(ds.indexPath, indexJSON, 0666)
 }
-
-// loadIndexIntoMemory loads index into the memory.
-func loadIndexIntoMemory(ctx context.Context, index *ocispec.Index, fetcher content.Fetcher, tagger content.Tagger, graph *graph.Memory) error {
-	for _, desc := range index.Manifests {
-		if err := tagger.Tag(ctx, deleteAnnotationRefName(desc), desc.Digest.String()); err != nil {
-			return err
-		}
-		if ref := desc.Annotations[ocispec.AnnotationRefName]; ref != "" {
-			if err := tagger.Tag(ctx, desc, ref); err != nil {
-				return err
-			}
-		}
-		plain := descriptor.Plain(desc)
-		if err := graph.IndexAll(ctx, fetcher, plain); err != nil {
-			return err
-		}
-	}
-	return nil
-}