🚧 remove new keyword to get inline with dart 2 code standard.

google_signin/lib/user.dart

@@ -13,22 +13,22 @@ class User extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    return new Scaffold(
-      appBar: new AppBar(
-        title: new Text("Welcome"),
+    return Scaffold(
+      appBar: AppBar(
+        title: Text("Welcome"),
         actions: <Widget>[
-          new IconButton(
-              icon: new Icon(Icons.exit_to_app), onPressed: this.onLogout)
+          IconButton(
+              icon: Icon(Icons.exit_to_app), onPressed: this.onLogout)
         ],
       ),
-      body: new Container(
+      body: Container(
           padding: const EdgeInsets.all(20.0),
-          child: new Center(
-              child: new Column(
+          child: Center(
+              child: Column(
             mainAxisAlignment: MainAxisAlignment.center,
             children: <Widget>[
-              new Image.network(user.photoUrl),
-              new Text(
+              Image.network(user.photoUrl),
+              Text(
                 user.displayName,
                 textScaleFactor: 1.5,
               ),