DART

flutter appbar remove debug

// Add debugShowCheckedModeBanner: false to your Material
return new MaterialApp(
	debugShowCheckedModeBanner: false,
    theme: new ThemeData(
      primarySwatch: Colors.green,
    ),
    //...
);

remove debug bar flutter

runApp(MaterialApp(
      debugShowCheckedModeBanner: false,     
      .....
));