change reverted

src/main/java/org/gcube/common/storagehub/model/storages/StorageBackend.java

@@ -13,7 +13,7 @@ public interface StorageBackend {
 	
 	String onMove(AbstractFileItem item);
 	
-	void onDelete(String id);
+	void onDelete(Content id);
 	
 	MetaInfo upload(InputStream stream, String relativePath, String name);