[imitation game] Remove package (flutter#2945)

This removes imitation_game from the respository, as it hasn't been
used in several years, and requires some overhead just to keep it
compiling and passing CI (e.g., it is currently blocking the Flutter
roller due to a dependency that is not Flutter 3-ready.)

If in the future it will be actively developed, it can be restored from
history and updated as necessary by its active maintainers.

.github/dependabot.yml

@@ -83,16 +83,6 @@ updates:
     ignore:
       - dependency-name: "*"
         update-types: ["version-update:semver-minor", "version-update:semver-patch"]
-  - package-ecosystem: "gradle"
-    directory: "/packages/imitation_game/imitation_tests/smiley/flutter/smiley/android/app"
-    commit-message:
-      prefix: "[imitation]"
-    schedule:
-      interval: "weekly"
-    open-pull-requests-limit: 10
-    ignore:
-      - dependency-name: "*"
-        update-types: ["version-update:semver-minor", "version-update:semver-patch"]
   - package-ecosystem: "gradle"
     directory: "/packages/palette_generator/example/android/app"
     commit-message:

.github/labeler.yml

@@ -40,9 +40,6 @@
 'p: google_identity_services':
   - packages/google_indentity_services_web/**
 
-'p: imitation_game':
-  - packages/imitation_game/**/*
-
 'p: metrics_center':
   - packages/metrics_center/**/*
 

CODEOWNERS

@@ -18,7 +18,6 @@ packages/flutter_template_images/**       @stuartmorgan
 packages/go_router/**                     @chunhtai
 packages/go_router_builder/**             @chunhtai
 packages/google_identity_services_web/**  @ditman
-packages/imitation_game/**                @gaaclarke
 packages/metrics_center/**                @keyonghan
 packages/multicast_dns/**                 @dnfield
 packages/palette_generator/**             @gspencergoog

README.md

@@ -47,7 +47,6 @@ These are the available packages in this repository.
 | [flutter_template_images](./packages/flutter_template_images/) | [![pub package](https://img.shields.io/pub/v/flutter_template_images.svg)](https://pub.dev/packages/flutter_template_images) | [![GitHub issues by-label](https://img.shields.io/github/issues/flutter/flutter/p:%20flutter_template_images?label=)](https://github.com/flutter/flutter/labels/p%3A%20flutter_template_images) | [![GitHub pull requests by-label](https://img.shields.io/github/issues-pr/flutter/packages/p:%20flutter_template_images?label=)](https://github.com/flutter/packages/labels/p%3A%20flutter_template_images) |
 | [go\_router](./packages/go_router/) | [![pub package](https://img.shields.io/pub/v/go_router.svg)](https://pub.dev/packages/go_router) | [![GitHub issues by-label](https://img.shields.io/github/issues/flutter/flutter/p:%20go_router?label=)](https://github.com/flutter/flutter/labels/p%3A%20go_router) | [![GitHub pull requests by-label](https://img.shields.io/github/issues-pr/flutter/packages/p:%20go_router?label=)](https://github.com/flutter/packages/labels/p%3A%20go_router) |
 | [go\_router\_builder](./packages/go_router_builder/) | [![pub package](https://img.shields.io/pub/v/go_router_builder.svg)](https://pub.dev/packages/go_router_builder) | [![GitHub issues by-label](https://img.shields.io/github/issues/flutter/flutter/p:%20go_router_builder?label=)](https://github.com/flutter/flutter/labels/p%3A%20go_router_builder) | [![GitHub pull requests by-label](https://img.shields.io/github/issues-pr/flutter/packages/p:%20go_router_builder?label=)](https://github.com/flutter/packages/labels/p%3A%20go_router_builder) |
-| [imitation_game](./packages/imitation_game/) | [![pub package](https://img.shields.io/pub/v/imitation_game.svg)](https://pub.dev/packages/imitation_game) | [![GitHub issues by-label](https://img.shields.io/github/issues/flutter/flutter/p:%20imitation_game?label=)](https://github.com/flutter/flutter/labels/p%3A%20imitation_game) | [![GitHub pull requests by-label](https://img.shields.io/github/issues-pr/flutter/packages/p:%20imitation_game?label=)](https://github.com/flutter/packages/labels/p%3A%20imitation_game) |
 | [metrics_center](./packages/metrics_center/) | [![pub package](https://img.shields.io/pub/v/metrics_center.svg)](https://pub.dev/packages/metrics_center) | [![GitHub issues by-label](https://img.shields.io/github/issues/flutter/flutter/p:%20metrics_center?label=)](https://github.com/flutter/flutter/labels/p%3A%20metrics_center) | [![GitHub pull requests by-label](https://img.shields.io/github/issues-pr/flutter/packages/p:%20metrics_center?label=)](https://github.com/flutter/packages/labels/p%3A%20metrics_center) |
 | [multicast\_dns](./packages/multicast_dns/) | [![pub package](https://img.shields.io/pub/v/multicast_dns.svg)](https://pub.dev/packages/multicast_dns) | [![GitHub issues by-label](https://img.shields.io/github/issues/flutter/flutter/p:%20multicast_dns?label=)](https://github.com/flutter/flutter/labels/p%3A%20multicast_dns) | [![GitHub pull requests by-label](https://img.shields.io/github/issues-pr/flutter/packages/p:%20multicast_dns?label=)](https://github.com/flutter/packages/labels/p%3A%20multicast_dns) |
 | [palette\_generator](./packages/palette_generator/) | [![pub package](https://img.shields.io/pub/v/palette_generator.svg)](https://pub.dartlang.org/packages/palette_generator) | [![GitHub issues by-label](https://img.shields.io/github/issues/flutter/flutter/p:%20palette_generator?label=)](https://github.com/flutter/flutter/labels/p%3A%20palette_generator) | [![GitHub pull requests by-label](https://img.shields.io/github/issues-pr/flutter/packages/p:%20palette_generator?label=)](https://github.com/flutter/packages/labels/p%3A%20palette_generator) |