fix: remove workaround

Author: thibaultzanini

packages/views/lib/onboarding_view.dart

@@ -240,13 +240,7 @@ class FastOnboardingViewState extends State<FastOnboardingView> {
 
     widget.onDone?.call();
 
-    // FIXME: use go instead of pushReplacement as a workaround to allow
-    // go router to works with top level routes and shell routes.
-    // users will be able to go back to the onboarding screen if they
-    // press the back button on the device.
-    // ISSUE: https://github.com/flutter/flutter/issues/137545
-
-    if (mounted) GoRouter.of(context).go(widget.homeLocation);
+    if (mounted) GoRouter.of(context).pushReplacement(widget.homeLocation);
   }
 
   String _getDoneText() {