Account for recent codelab removals (#12965)

- Removes the removed codelabs from the
`src/data/learning-resources-index/codelabs.yml` that is used to
populate https://docs.flutter.dev/reference/learning-resources.
- Removes mentions of the removed codelabs where they are mentioned from
non-historical docs, like the game toolkit page.
- For codelabs linked to from the what's new archive, which is a
historical doc, link to a backup on the wayback machine and add a
clarification they are archived.

Fixes #12953

Author: parlough

firebase.json

@@ -479,7 +479,7 @@
       { "source": "/go/flutter-web-scenelets", "destination": "https://docs.google.com/document/d/1GUAx3aqdtEoaBMTNpsS1-i59QZlwTi6vUCASbaanPCo", "type": 301 },
       { "source": "/go/flutter-wrapped-2025", "destination": "https://docs.google.com/document/d/1cE-oE1ULMeoguPDBKAqWY5AwQOuyZae-NF9v-2YhD9Y/edit?usp=sharing", "type": 301 },
       { "source": "/go/focus-management", "destination": "https://docs.google.com/document/d/1-NS3NJFd2j9kzKj5GOPoWq-G0B6jrpiCL892EX5Nxgk/edit", "type": 301 },
-      { "source": "/go/forge2d-workshop", "destination": "https://codelabs.developers.google.com/codelabs/flutter-flame-forge2d#0", "type": 301 },
+      { "source": "/go/forge2d-workshop", "destination": "https://web.archive.org/web/20260108140911/https://codelabs.developers.google.com/codelabs/flutter-flame-forge2d", "type": 301 },
       { "source": "/go/form-field-autovalidation", "destination": "https://docs.google.com/document/d/16HAURcOtYAoHntDOEtdGy9KkKSItulG9Ldyjzdaosqo/edit", "type": 301 },
       { "source": "/go/fragment-program-support", "destination": "https://docs.google.com/document/d/1R0qx3znTe_wcKZoeWwkMlgxs1MtrdiPJ_1xiuExZuH0/edit", "type": 301 },
       { "source": "/go/framework-devtool-a11y-support", "destination": "https://docs.google.com/document/d/1lR0QaojgeprwwAy8Ks57rCPKUQOCCRz7Zh3yybKLOsk/edit?usp=sharing", "type": 301 },

src/content/platform-integration/desktop.md

@@ -186,12 +186,9 @@ about endorsed plugins, see the following resources:
 [How to write a Flutter web plugin, part 2]: {{site.flutter-blog}}/how-to-write-a-flutter-web-plugin-part-2-afdddb69ece6
 [Modern Flutter Plugin Development]: {{site.flutter-blog}}/modern-flutter-plugin-development-4c3ee015cf5a
 
-## Samples and codelabs
+<a id="samples-and-codelabs" aria-hidden="true"></a>
 
-[Write a Flutter desktop application][]
-: A codelab that walks you through building
-a desktop application that integrates the GitHub
-GraphQL API with your Flutter app.
+## Samples
 
 You can run the following samples as desktop apps,
 as well as download and inspect the source code to
@@ -219,4 +216,3 @@ Flokk [announcement blogpost][gskinner-flokk-blogpost], [repo][gskinner-flokk-re
 [Photo Search app]: {{site.repo.samples}}/tree/main/desktop_photo_search
 [gskinner-flokk-repo]: {{site.github}}/gskinnerTeam/flokk
 [gskinner-flokk-blogpost]: https://blog.gskinner.com/archives/2020/09/flokk-how-we-built-a-desktop-app-using-flutter.html
-[Write a Flutter desktop application]: {{site.codelabs}}/codelabs/flutter-github-client

src/content/release/archive-whats-new.md

@@ -642,17 +642,17 @@ The following codelabs have been published since Flutter 3.7:
   Discover Dart 3's new records and patterns features.
   Learn how you can use them in a Flutter app to help you
   write more readable and maintainable Dart code.
-* [Building next generation UIs in Flutter][]<br>
+* [Building next generation UIs in Flutter][] _(Now archived)_ <br>
   Learn how to build a Flutter app that uses the power of `flutter_animate`,
   fragment shaders, and particle fields. You will craft a user interface that
   evokes those science fiction movies and TV shows we all love
   watching when we aren't coding.
-* [Create haikus about Google products with the PaLM API and Flutter][]<br> **NEW**
+* [Create haikus about Google products with the PaLM API and Flutter][]<br>
   Learn how to build an app that uses the PaLM API to generate haikus
   based on Google product names. The PaLM API gives you access to Google's
   state-of-the-art large language models.
 
-[Building next generation UIs in Flutter]: {{site.codelabs}}/codelabs/flutter-next-gen-uis#0
+[Building next generation UIs in Flutter]: https://web.archive.org/web/20251126130753/https://codelabs.developers.google.com/codelabs/flutter-next-gen-uis
 [Records and Patterns in Dart 3]: {{site.codelabs}}/codelabs/dart-patterns-records
 [Create haikus about Google products with the PaLM API and Flutter]: {{site.codelabs}}/haiku-generator
 
@@ -782,7 +782,7 @@ We have new codelabs since the last stable release:
   The final app is responsive to different screen sizes.
   (Note that this codelab replaces the previous "Write
   your first Flutter codelab for mobile, part 1 and part 2.")
-* [Using FFI in a Flutter plugin][]<br>
+* [Using FFI in a Flutter plugin][] _(Now archived)_ <br>
   Dart's FFI (foreign function interface) allows Flutter apps
   to use of existing native libraries that expose a C API.
   Dart supports FFI on Android, iOS, Windows, macOS, and Linux.
@@ -798,7 +798,7 @@ We have new codelabs since the last stable release:
   and Google Sign In authorization to a Flutter app. You'll also learn
   how to set up a Firebase project,
   and use the FlutterFire CLI to initialize Firebase in your Flutter app.
-* [Local development for your Flutter apps using the Firebase Emulator Suite][]<br>
+* [Local development for your Flutter apps using the Firebase Emulator Suite][] _(Now archived)_ <br>
   Learn how to use the Firebase Emulator Suite with Flutter during local development,
   including how to use email-password authentication with the Emulator Suite,
   and how to read and write data to the Firestore emulator. Also, you'll import
@@ -813,8 +813,8 @@ to reflect the latest available codelabs.
 [Add a user authentication flow to a Flutter app using FirebaseUI]: {{site.firebase}}/codelabs/firebase-auth-in-flutter-apps
 [Building a game with Flutter and Flame]: {{site.codelabs}}/codelabs/flutter-flame-game
 [codelabs & workshops]: /reference/learning-resources
-[Local development for your Flutter apps using the Firebase Emulator Suite]: {{site.firebase}}/codelabs/get-started-firebase-emulators-and-flutter
-[Using FFI in a Flutter plugin]: {{site.codelabs}}/codelabs/flutter-ffigen
+[Local development for your Flutter apps using the Firebase Emulator Suite]: https://web.archive.org/web/20251102002913/https://firebase.google.com/codelabs/get-started-firebase-emulators-and-flutter
+[Using FFI in a Flutter plugin]: https://web.archive.org/web/20250908035316/https://codelabs.developers.google.com/codelabs/flutter-ffigen
 [Your first Flutter app]: {{site.codelabs}}/codelabs/flutter-codelab-first
 
 **Articles**
@@ -957,15 +957,15 @@ and the [Flutter 3 release notes][].
 
 We have a new codelab since the last stable release:
 
-* [Take your Flutter app from boring to beautiful][]
+* [Take your Flutter app from boring to beautiful][] _(Now archived)_ <br>
   Learn how to use features in Material 3 to make your
   more beautiful _and_ more responsive.
 
 Also, check out the workshops written by our GDEs
 and available on the [Flutter community blog][].
 
 [Flutter community blog]: {{site.medium}}/@flutter_community/622b52f70173
-[Take your Flutter app from boring to beautiful]: {{site.codelabs}}/codelabs/flutter-boring-to-beautiful
+[Take your Flutter app from boring to beautiful]: https://web.archive.org/web/20251204045151/https://codelabs.developers.google.com/codelabs/flutter-boring-to-beautiful
 
 **Videos**
 
@@ -1351,10 +1351,10 @@ we wrote new codelabs and updated existing codelabs.
 New codelabs include:
 
 * [Adding Admob Ads to a Flutter app][]
-* [How to write a Flutter plugin][]
+* [How to write a Flutter plugin][] _(Now archived)_
 * [Multi-platform Firestore Flutter][]
-* [Using a plugin with a Flutter web app][]
-* [Write a Flutter desktop application][]
+* [Using a plugin with a Flutter web app][] _(Now archived)_
+* [Write a Flutter desktop application][] _(Now archived)_
 
 For a complete list, see [Flutter codelabs][].
 
@@ -1403,7 +1403,7 @@ publication since the last stable release:
 [Flutter Performance Updates in 2019]: {{site.flutter-blog}}/going-deeper-with-flutters-web-support-66d7ad95eb5224
 [Going deeper with Flutter's web support]: {{site.flutter-blog}}/going-deeper-with-flutters-web-support-66d7ad95eb52
 [Handling 404: Page not found error in Flutter]: {{site.flutter-blog}}/handling-404-page-not-found-error-in-flutter-731f5a9fba29
-[How to write a Flutter plugin]: {{site.codelabs}}/codelabs/write-flutter-plugin
+[How to write a Flutter plugin]: https://web.archive.org/web/20250908035316/https://codelabs.developers.google.com/codelabs/flutter-ffigen
 [Managing issues in a large-scale open source project]: {{site.flutter-blog}}/managing-issues-in-a-large-scale-open-source-project-b3be6eecae2b
 [How to debug layout issues with the Flutter Inspector]: {{site.flutter-blog}}/how-to-debug-layout-issues-with-the-flutter-inspector-87460a7b9db
 [Multi-platform Firestore Flutter]: {{site.codelabs}}/codelabs/friendlyeats-flutter/
@@ -1413,11 +1413,11 @@ publication since the last stable release:
 [Two Months of #FlutterGoodNewsWednesday]: {{site.flutter-blog}}/two-months-of-fluttergoodnewswednesday-a12e60bab782
 [ubuntu]: {{site.flutter-blog}}/announcing-flutter-linux-alpha-with-canonical-19eb824590a9
 [Understanding null safety]: {{site.dart-site}}/null-safety/understanding-null-safety
-[Using a plugin with a Flutter web app]: {{site.codelabs}}/codelabs/web-url-launcher/
+[Using a plugin with a Flutter web app]: https://web.archive.org/web/20230927112932/https://codelabs.developers.google.com/codelabs/web-url-launcher
 [web-perf]: {{site.flutter-blog}}/improving-perceived-performance-with-image-placeholders-precaching-and-disabled-navigation-6b3601087a2b
 [What's new with the Slider widget?]: {{site.flutter-blog}}/whats-new-with-the-slider-widget-ce48a22611a3
 [What we learned from the Flutter Q2 2020 survey]: {{site.flutter-blog}}/what-we-learned-from-the-flutter-q2-2020-survey-a4f1fc8faac9
-[Write a Flutter desktop application]: {{site.codelabs}}/codelabs/flutter-github-graphql-client/
+[Write a Flutter desktop application]: https://web.archive.org/web/20250908033205/https://codelabs.developers.google.com/codelabs/flutter-github-client
 
 ## 06 May 2020: Work-From-Home: 1.17 release
 

src/content/resources/games-toolkit.md

@@ -8,10 +8,6 @@ showBreadcrumbs: false
 The Flutter Casual Games Toolkit pulls together new and existing resources
 so you can accelerate development of games on mobile platforms.
 
-:::recommend
-Check out the latest [game updates and resources for Flutter 3.22](#updates)!
-:::
-
 This page outlines where you can find these available resources.
 
 ## Why Flutter for games?
@@ -126,8 +122,6 @@ Are you ready? To get started:
 
    * Build a [multiplayer game][multiplayer-recipe] with Cloud Firestore.
    * Build a [word puzzle][] with Flutter.
-   * Build a [2D physics game][] with Flutter and Flame.
-   * [Add sound and music][] to your Flutter game with SoLoud.
    * Make your games more engaging
      with [leaderboards and achievements][leaderboard-recipe].
    * Monetize your games with [in-game ads][ads-recipe]
@@ -141,8 +135,6 @@ Are you ready? To get started:
 1. Write your game!
 1. Deploy to both the Google Play and Apple stores.
 
-[Add sound and music]: {{site.codelabs}}/codelabs/flutter-codelab-soloud
-[2D physics game]: {{site.codelabs}}/codelabs/flutter-flame-forge2d
 [word puzzle]: {{site.codelabs}}/codelabs/flutter-word-puzzle
 
 ## Example games
@@ -198,7 +190,6 @@ investigate other resources that our community recommended.
 
 <Icon id="package_2" title="Flutter package"></Icon> [audioplayers][]<br>
 <Icon id="package_2" title="Flutter package"></Icon> [flutter_soloud][]<br>
-<Icon id="science" title="Codelab"></Icon>  [Add sound and music to your Flutter game with SoLoud][]
 
 </td>
 </tr>
@@ -281,15 +272,6 @@ investigate other resources that our community recommended.
 </td>
 </tr>
 
-<tr>
-<td>Legacy code</td>
-<td>
-
-<Icon id="science" title="Codelab"></Icon> [Use the Foreign Function Interface in a Flutter plugin][]
-
-</td>
-</tr>
-
 <tr>
 <td>Level editor</td>
 <td>
@@ -336,7 +318,6 @@ investigate other resources that our community recommended.
 <td>User Experience</td>
 <td>
 
-<Icon id="science" title="Codelab"></Icon> [Build next generation UIs in Flutter][]<br>
 <Icon id="quick_reference_all" title="Guide"></Icon> [Best practices for optimizing Flutter web loading speed][]
 
 </td>
@@ -369,14 +350,12 @@ investigate other resources that our community recommended.
 [runner-template]: {{site.repo.games}}/tree/main/templates/endless_runner
 
 [Add AdMob ads to a Flutter app]: {{site.codelabs}}/codelabs/admob-ads-in-flutter
-[Build next generation UIs in Flutter]: {{site.codelabs}}/codelabs/flutter-next-gen-uis
 [firebase-crashlytics]: {{site.firebase}}/docs/crashlytics/get-started?platform=flutter
 [ads-recipe]: /cookbook/plugins/google-mobile-ads
 [iap-recipe]: {{site.codelabs}}/codelabs/flutter-in-app-purchases#0
 [leaderboard-recipe]: /cookbook/games/achievements-leaderboard
 [multiplayer-recipe]: /cookbook/games/firestore-multiplayer
 [firebase-auth]: {{site.firebase}}/codelabs/firebase-auth-in-flutter-apps#0
-[Use the Foreign Function Interface in a Flutter plugin]: {{site.codelabs}}/codelabs/flutter-ffigen
 [bonfire-pkg]: {{site.pub}}/packages/bonfire
 [CraftPix]: https://craftpix.net
 [Add Firebase to your Flutter game]: {{site.firebase}}/docs/flutter/setup
@@ -402,56 +381,7 @@ investigate other resources that our community recommended.
 [web]: https://superdash.flutter.dev/
 [Tiled]: https://www.mapeditor.org/
 [flutter_soloud]: {{site.pub-pkg}}/flutter_soloud
-[SoLoud codelab]: {{site.codelabs}}/codelabs/flutter-codelab-soloud
-
-## Games Toolkit updates for Flutter 3.22 {:#updates}
-
-The following codelabs and guides were added for
-the Flutter 3.22 release:
-
-**Low-latency, high-performance sound**
-: In collaboration with the Flutter community ([@Marco Bavagnoli][]),
-  we've enabled the SoLoud audio engine.
-  This free and portable engine delivers the low-latency and
-  high-performance sound that's essential for many games.
-  To help you get started, check out the codelab,
-  [Add sound and music to your Flutter game with SoLoud][],
-  dedicated to adding sound and music to your game.
-
-**Word puzzle games**
-: Check out the codelab,
-  [Build a word puzzle with Flutter][],
-  focused on building word puzzle games.
-  This genre is perfect for exploring Flutter's UI capabilities,
-  and this codelab dives into using Flutter's background processing
-  to effortlessly generate expansive crossword-style grids of
-  interlocking words without compromising the user experience.
-
-**Forge 2D physics engine**
-: The Forge2D codelab,
-  [Build a 2D physics game with Flutter and Flame][],
-  guides you through crafting game mechanics in a
-  Flutter and Flame game using a 2D physics simulation
-  along the lines of Box2D, called [Forge2D][].
-
-**Optimize loading speed for Flutter web-based games**
-: In the fast-paced world of web-based gaming,
-  a slow-loading game is a major deterrent.
-  Players expect instant gratification and will
-  quickly abandon a game that doesn't load promptly.
-  Hence, we've published a guide,
-  [Best practices for optimizing Flutter web loading speed][],
-  authored by [Cheng Lin][],
-  to help you optimize your Flutter web-based games
-  and apps for lightning-fast loading speeds.
-
-[@Marco Bavagnoli]: {{site.github}}/alnitak
-[Add sound and music to your Flutter game with SoLoud]: {{site.codelabs}}/codelabs/flutter-codelab-soloud
 [Best practices for optimizing Flutter web loading speed]: {{site.flutter-blog}}/best-practices-for-optimizing-flutter-web-loading-speed-7cc0df14ce5c
-[Build a word puzzle with Flutter]: {{site.codelabs}}/codelabs/flutter-word-puzzle
-[Build a 2D physics game with Flutter and Flame]: {{site.codelabs}}/codelabs/flutter-flame-forge2d
-[Cheng Lin]: {{site.medium}}/@mhclin113_26002
-[Forge2D]: {{site.pub-pkgs}}/forge2d
 
 ## Other resources
 

src/content/testing/overview.md

@@ -8,11 +8,6 @@ The more features your app has, the harder it is to test manually.
 Automated tests help ensure that your app performs correctly before
 you publish it, while retaining your feature and bug fix velocity.
 
-:::note
-For hands-on practice of testing Flutter apps, see the
-[How to test a Flutter app][] codelab.
-:::
-
 Automated testing falls into a few categories:
 
 * A [_unit test_](#unit-tests) tests a single function, method, or class.
@@ -130,7 +125,6 @@ integration services, see the following:
 [Codemagic CI/CD for Flutter]: https://blog.codemagic.io/getting-started-with-codemagic/
 [Continuous delivery using fastlane with Flutter]: /deployment/cd#fastlane
 [Flutter CI/CD with Bitrise]: https://devcenter.bitrise.io/en/getting-started/quick-start-guides/getting-started-with-flutter-apps
-[How to test a Flutter app]: {{site.codelabs}}/codelabs/flutter-app-testing
 [Test Flutter apps on Appcircle]: https://blog.appcircle.io/article/flutter-ci-cd-github-ios-android-web#
 [Test Flutter apps on Cirrus]: https://cirrus-ci.org/examples/#flutter
 [Test Flutter apps on Travis]: {{site.flutter-blog}}/test-flutter-apps-on-travis-3fd5142ecd8c