fix: remove old unused features and widgets

lib/features/auth/auth_screen/models/auth_model.dart

@@ -0,0 +1,16 @@
+// ignore_for_file: must_be_immutable
+
+import 'package:equatable/equatable.dart';
+
+/// This class defines the variables used in the [auth_screen],
+/// and is typically used to hold data that is passed between different parts of the application.
+class AuthModel extends Equatable {
+  AuthModel();
+
+  AuthModel copyWith() {
+    return AuthModel();
+  }
+
+  @override
+  List<Object?> get props => [];
+}