Remove unused model

lib/models/face.dart

@@ -1,15 +0,0 @@
-import 'package:photos/core/configuration.dart';
-
-class Face {
-  final int id;
-
-  Face.fromJson(Map<String, dynamic> json) : id = json["id"];
-
-  String getThumbnailUrl() {
-    return Configuration.instance.getHttpEndpoint() +
-        "/photos/face/thumbnail/" +
-        id.toString() +
-        "?token=" +
-        Configuration.instance.getToken();
-  }
-}