refactor:

lib/widgets/app_bar/exit_button.dart

@@ -1,22 +1,16 @@
-import 'package:eatvio_app/core/app_export.dart';
+import 'package:eatvio_app/theme/custom_text_style.dart';
 import 'package:flutter/material.dart';
 
-// ignore: must_be_immutable
 class ExitButton extends StatelessWidget {
-  ExitButton({
-    Key? key,
+  const ExitButton({
     required this.text,
     this.margin,
     this.onTap,
-  }) : super(
-          key: key,
-        );
+  });
 
-  String text;
-
-  EdgeInsetsGeometry? margin;
-
-  Function? onTap;
+  final String text;
+  final EdgeInsetsGeometry? margin;
+  final Function? onTap;
 
   @override
   Widget build(BuildContext context) {