added more blocs

lib/clients/storage/storage_client.dart

@@ -13,6 +13,11 @@ class StorageClient {
         return file.readAsString();
     }
 
+    delete(String filename) async {
+      File file = await _getJson(filename);
+      await file.delete();
+    }
+
     Future<File> _getJson(String filename) async {
         final dir = await getApplicationDocumentsDirectory();
         final file = File('${dir.path}/$filename');