Revert "[shared_preferences] Add shared preferences devtools" (flutter#8314)

Reverts flutter#6749

This is failing the publish step:

```
Running 'build_and_copy' in shared_preferences_tool
[build_and_copy] Building the extension Flutter web app...
Could not find an option named "--web-renderer".

Run 'flutter -h' (or 'flutter <command> -h') for available flutter commands and options.
Unhandled exception:
ProcessException: Failed with exit code: 64
  Command: flutter build web --web-renderer canvaskit --pwa-strategy=offline-first --release --no-tree-shake-icons
#0      BuildExtensionCommand._runProcess (file:///b/s/w/ir/x/w/.pub-cache/hosted/pub.dev/devtools_extensions-0.2.2/bin/_build_and_copy.dart:134:7)
<asynchronous suspension>
flutter#1      BuildExtensionCommand.run (file:///b/s/w/ir/x/w/.pub-cache/hosted/pub.dev/devtools_extensions-0.2.2/bin/_build_and_copy.dart:57:5)
<asynchronous suspension>
flutter#2      CommandRunner.runCommand (package:args/command_runner.dart:212:13)
<asynchronous suspension>
flutter#3      SharedStdIn.terminate (package:io/src/shared_stdin.dart:91:3)
<asynchronous suspension>
flutter#4      main (file:///b/s/w/ir/x/w/.pub-cache/hosted/pub.dev/devtools_extensions-0.2.2/bin/devtools_extensions.dart:16:3)
<asynchronous suspension>
```

Author: stuartmorgan-g

CODEOWNERS

@@ -124,7 +124,3 @@ packages/local_auth/local_auth_windows/**                @cbracken
 packages/path_provider/path_provider_windows/**          @cbracken
 packages/shared_preferences/shared_preferences_windows/** @cbracken
 packages/url_launcher/url_launcher_windows/**            @cbracken
-
-# - DevTools extensions
-# @adsonpleal is the actual maintainer of shared_preferences_tool but is not yet a committer, so can't be listed as the owner.
-packages/shared_preferences/shared_preferences_tool/**  @tarrinneal

packages/shared_preferences/shared_preferences/CHANGELOG.md

@@ -1,7 +1,3 @@
-## 2.4.0
-
-* Adds shared preferences devtools extension
-
 ## 2.3.3
 
 * Clarifies scope of prefix handling in README.

packages/shared_preferences/shared_preferences/extension/devtools/.gitignore

@@ -8,8 +8,6 @@ import 'package:flutter/foundation.dart';
 import 'package:shared_preferences_platform_interface/shared_preferences_async_platform_interface.dart';
 import 'package:shared_preferences_platform_interface/types.dart';
 
-import 'shared_preferences_devtools_extension_data.dart';
-
 /// Provides a persistent store for simple data.
 ///
 /// Data is persisted to and fetched from the disk asynchronously.
@@ -403,10 +401,3 @@ class SharedPreferencesWithCache {
     return _cacheOptions.allowList?.contains(key) ?? true;
   }
 }
-
-// Include an unused import to ensure this library is included
-// when running `flutter run -d chrome`.
-// Check this discussion for more info: https://github.com/flutter/packages/pull/6749/files/6eb1b4fdce1eba107294770d581713658ff971e9#discussion_r1755375409
-// ignore: unused_element
-final bool _fieldToKeepDevtoolsExtensionReachable =
-    fieldToKeepDevtoolsExtensionLibraryAlive;

packages/shared_preferences/shared_preferences/extension/devtools/.pubignore

@@ -8,8 +8,6 @@ import 'package:flutter/foundation.dart' show visibleForTesting;
 import 'package:shared_preferences_platform_interface/shared_preferences_platform_interface.dart';
 import 'package:shared_preferences_platform_interface/types.dart';
 
-import 'shared_preferences_devtools_extension_data.dart';
-
 /// Wraps NSUserDefaults (on iOS) and SharedPreferences (on Android), providing
 /// a persistent store for simple data.
 ///
@@ -287,10 +285,3 @@ Either update the implementation to support setPrefix, or do not call setPrefix.
     _completer = null;
   }
 }
-
-// Include an unused import to ensure this library is included
-// when running `flutter run -d chrome`.
-// Check this discussion for more info: https://github.com/flutter/packages/pull/6749/files/6eb1b4fdce1eba107294770d581713658ff971e9#discussion_r1755375409
-// ignore: unused_element
-final bool _fieldToKeepDevtoolsExtensionReachable =
-    fieldToKeepDevtoolsExtensionLibraryAlive;

packages/shared_preferences/shared_preferences/extension/devtools/config.yaml

@@ -1,8 +1,9 @@
 name: shared_preferences
-description: Flutter plugin for reading and writing simple key-value pairs. Wraps NSUserDefaults on iOS and SharedPreferences on Android.
+description: Flutter plugin for reading and writing simple key-value pairs.
+  Wraps NSUserDefaults on iOS and SharedPreferences on Android.
 repository: https://github.com/flutter/packages/tree/main/packages/shared_preferences/shared_preferences
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+shared_preferences%22
-version: 2.4.0
+version: 2.3.3
 
 environment:
   sdk: ^3.4.0
@@ -39,7 +40,6 @@ dev_dependencies:
     sdk: flutter
   integration_test:
     sdk: flutter
-  path: ^1.9.0
 
 topics:
   - persistence