how to create empty screen title bar and back button in flutter

Empty Screen

  
import 'package:flutter/material.dart';

void main() {
  runApp(MaterialApp(
    debugShowCheckedModeBanner: false,
    home: joinpro(),
  ));
}

class joinpro extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        backgroundColor: Colors.red,
        leading: IconButton(
          icon: Icon(Icons.arrow_back, color: Colors.white),
          onPressed: () {
            Navigator.pop(context);
          },
        ),
        title: Text(
          "Settings",
          style: TextStyle(
            color: Colors.white,
            fontSize: 20,
            fontWeight: FontWeight.bold,
          ),
        ),
      ),



    



    );
  }
}