chore: remove game_template sample and clean up experimental sample m… (#2829)

Fixes #2526

experimental/README.md

@@ -1,5 +0,0 @@
-# Deprecated
-
-The `experimental` directory has been deprecated. All samples within have been deleted or moved to [github.com/flutter/demos][]
-
-

experimental/context_menus/README.md

@@ -1,5 +0,0 @@
-# Custom Context Menus
-
-The [Custom Context Menus](https://github.com/flutter/samples/tree/main/context_menus)
-app has been moved out of the experimental directory of this repository as it now 
-works on stable channel of Flutter.

experimental/date_planner/README.md

@@ -1,3 +0,0 @@
-# Relocation notice
-
-The date-planner app has been moved [to the samples directory](../../date_planner).

experimental/desktop_photo_search/README.md

@@ -1,3 +0,0 @@
-# Photo Search app
-
-This application has been moved to the [top level of this repo](../../desktop_photo_search).

experimental/federated_plugin/README.md

@@ -1,3 +0,0 @@
-# Sample moved
-
-The `federated_plugin` sample has been moved to the [flutter/demos][https://github.com/flutter/demos] repository, and is no longer maintained.

experimental/linting_tool/README.md

@@ -1,34 +0,0 @@
-# Sample retired
-
-The `linting_tool` sample has been retired.
-Flutter's desktop support has evolved over the years and
-the underlying data that this tool surfaced is no longer supported.
-
-`linting_tool` was a successful sample of using Flutter to build desktop apps,
-written by Abdullah Deshmukh ([X][], [GitHub][]) for Google Summer of Code 2021.
-You can learn about Abdullah's experience creating the sample
-by reading [GSoC '21: Creating a desktop sample for Flutter][medium].
-
-[X]: https://x.com/abdullahzakir99
-[GitHub]: https://github.com/abd99
-[medium]: https://medium.com/flutter/gsoc-21-creating-a-desktop-sample-for-flutter-7d77e74812d6
-
-## Flutter on Desktop
-
-Flutter supports creating desktop apps for Windows, macOS, and Linux.
-To set up platform support or learn more about [Flutter on Desktop][],
-check out the [platform integration docs][] for each desktop platform.
-
-[Flutter on Desktop]: https://flutter.dev/multi-platform/desktop
-[platform integration docs]: https://docs.flutter.dev/platform-integration/desktop
-
-## Analyzing and linting Dart projects
-
-To learn more about configuring analysis of your Dart and Flutter projects,
-check out [Customizing static analysis][].
-
-For information about the various lints you can configure,
-reference the [Linter rules][] index.
-
-[Customizing static analysis]: https://dart.dev/tools/analysis
-[Linter rules]: https://dart.dev/lints

experimental/varfont_shader_puzzle/README.md

@@ -1,3 +0,0 @@
-# Sample moved
-
-The `varfont_shader_puzzle` sample has been moved to the [flutter/demos][https://github.com/flutter/demos] repository, and is no longer maintained.