[go_router] Avoid unnecessary null checks (#3142)

* Avoid unnecessary null checks

The public static analysis complained about these errors and deducted
the final package score on pub.dev

* Upgrade package version

Author: ricardodalarme

packages/go_router/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 6.0.5
+
+- Fixes [unnecessary_null_comparison](https://dart-lang.github.io/linter/lints/unnecessary_null_checks.html) lint warnings.
+
 ## 6.0.4
 
 - Fixes redirection info log.

packages/go_router/lib/src/builder.dart

@@ -305,10 +305,6 @@ class RouteBuilder {
       {Widget? childWidget}) {
     final RouteBase route = match.route;
 
-    if (route == null) {
-      throw _RouteBuilderError('No route found for match: $match');
-    }
-
     if (route is GoRoute) {
       final GoRouterWidgetBuilder? builder = route.builder;
 

packages/go_router/lib/src/configuration.dart

@@ -81,7 +81,7 @@ class RouteConfiguration {
             ],
           );
         }
-      } else if (route is ShellRoute && route.navigatorKey != null) {
+      } else if (route is ShellRoute) {
         _debugCheckParentNavigatorKeys(
           route.routes,
           <GlobalKey<NavigatorState>>[...allowedKeys..add(route.navigatorKey)],

packages/go_router/pubspec.yaml

@@ -1,7 +1,7 @@
 name: go_router
 description: A declarative router for Flutter based on Navigation 2 supporting
   deep linking, data-driven routes and more
-version: 6.0.4
+version: 6.0.5
 repository: https://github.com/flutter/packages/tree/main/packages/go_router
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+go_router%22