[process] Remove from the repository (flutter#9310)

`process` moved to
https://github.com/dart-lang/tools/tree/main/pkgs/process, so this version is legacy and should be removed.

Author: stuartmorgan-g

CODEOWNERS

@@ -29,7 +29,6 @@ packages/pigeon/**                                       @tarrinneal
 packages/platform/**                                     @stuartmorgan-g
 packages/plugin_platform_interface/**                    @stuartmorgan-g
 packages/pointer_interceptor/**                          @ditman
-packages/process/**                                      @stuartmorgan-g
 packages/quick_actions/**                                @bparrishMines
 packages/rfw/**                                          @Hixie
 packages/shared_preferences/**                           @tarrinneal

README.md

@@ -64,7 +64,6 @@ These are the packages hosted in this repository:
 | [pigeon](./packages/pigeon/) | [![pub package](https://img.shields.io/pub/v/pigeon.svg)](https://pub.dev/packages/pigeon) | [![pub points](https://img.shields.io/pub/points/pigeon)](https://pub.dev/packages/pigeon/score) | [![popularity](https://img.shields.io/pub/popularity/pigeon)](https://pub.dev/packages/pigeon/score) | [![GitHub issues by-label](https://img.shields.io/github/issues/flutter/flutter/p%3A%20pigeon?label=)](https://github.com/flutter/flutter/labels/p%3A%20pigeon) | [![GitHub pull requests by-label](https://img.shields.io/github/issues-pr/flutter/packages/p%3A%20pigeon?label=)](https://github.com/flutter/packages/labels/p%3A%20pigeon) |
 | [pointer\_interceptor](./packages/pointer_interceptor/) | [![pub package](https://img.shields.io/pub/v/pointer_interceptor.svg)](https://pub.dev/packages/pointer_interceptor) | [![pub points](https://img.shields.io/pub/points/pointer_interceptor)](https://pub.dev/packages/pointer_interceptor/score) | [![popularity](https://img.shields.io/pub/popularity/pointer_interceptor)](https://pub.dev/packages/pointer_interceptor/score) | [![GitHub issues by-label](https://img.shields.io/github/issues/flutter/flutter/p%3A%20pointer_interceptor?label=)](https://github.com/flutter/flutter/labels/p%3A%20pointer_interceptor) | [![GitHub pull requests by-label](https://img.shields.io/github/issues-pr/flutter/packages/p%3A%20pointer_interceptor?label=)](https://github.com/flutter/packages/labels/p%3A%20pointer_interceptor) |
 | [plugin\_platform\_interface](./packages/plugin_platform_interface/) | [![pub package](https://img.shields.io/pub/v/plugin_platform_interface.svg)](https://pub.dev/packages/plugin_platform_interface) | [![pub points](https://img.shields.io/pub/points/plugin_platform_interface)](https://pub.dev/packages/plugin_platform_interface/score) | [![popularity](https://img.shields.io/pub/popularity/plugin_platform_interface)](https://pub.dev/packages/plugin_platform_interface/score) | [![GitHub issues by-label](https://img.shields.io/github/issues/flutter/flutter/p%3A%20plugin_platform_interface?label=)](https://github.com/flutter/flutter/labels/p%3A%20plugin_platform_interface) | [![GitHub pull requests by-label](https://img.shields.io/github/issues-pr/flutter/packages/p%3A%20plugin_platform_interface?label=)](https://github.com/flutter/packages/labels/p%3A%20plugin_platform_interface) |
-| [process](./packages/process/) | [![pub package](https://img.shields.io/pub/v/process.svg)](https://pub.dev/packages/process) | [![pub points](https://img.shields.io/pub/points/process)](https://pub.dev/packages/process/score) | [![popularity](https://img.shields.io/pub/popularity/process)](https://pub.dev/packages/process/score) | [![GitHub issues by-label](https://img.shields.io/github/issues/flutter/flutter/p%3A%20process?label=)](https://github.com/flutter/flutter/labels/p%3A%20process) | [![GitHub pull requests by-label](https://img.shields.io/github/issues-pr/flutter/packages/p%3A%20process?label=)](https://github.com/flutter/packages/labels/p%3A%20process) |
 | [quick\_actions](./packages/quick_actions/) | [![pub package](https://img.shields.io/pub/v/quick_actions.svg)](https://pub.dev/packages/quick_actions) | [![pub points](https://img.shields.io/pub/points/quick_actions)](https://pub.dev/packages/quick_actions/score) | [![popularity](https://img.shields.io/pub/popularity/quick_actions)](https://pub.dev/packages/quick_actions/score) | [![GitHub issues by-label](https://img.shields.io/github/issues/flutter/flutter/p%3A%20quick_actions?label=)](https://github.com/flutter/flutter/labels/p%3A%20quick_actions) | [![GitHub pull requests by-label](https://img.shields.io/github/issues-pr/flutter/packages/p%3A%20quick_actions?label=)](https://github.com/flutter/packages/labels/p%3A%20quick_actions) |
 | [google\_identity\_services\_web](./packages/google_identity_services_web/) | [![pub package](https://img.shields.io/pub/v/google_identity_services_web.svg)](https://pub.dev/packages/google_identity_services_web) | [![pub points](https://img.shields.io/pub/points/google_identity_services_web)](https://pub.dev/packages/google_identity_services_web/score) | [![popularity](https://img.shields.io/pub/popularity/google_identity_services_web)](https://pub.dev/packages/google_identity_services_web/score) | [![GitHub issues by-label](https://img.shields.io/github/issues/flutter/flutter/p%3A%20google_identity_services_web?label=)](https://github.com/flutter/flutter/labels/p%3A%20google_identity_services_web) | [![GitHub pull requests by-label](https://img.shields.io/github/issues-pr/flutter/packages/p%3A%20google_identity_services_web?label=)](https://github.com/flutter/packages/labels/p%3A%20google_identity_services_web) |
 | [rfw](./packages/rfw/) | [![pub package](https://img.shields.io/pub/v/rfw.svg)](https://pub.dev/packages/rfw) | [![pub points](https://img.shields.io/pub/points/rfw)](https://pub.dev/packages/rfw/score) | [![popularity](https://img.shields.io/pub/popularity/rfw)](https://pub.dev/packages/rfw/score) | [![GitHub issues by-label](https://img.shields.io/github/issues/flutter/flutter/p%3A%20rfw?label=)](https://github.com/flutter/flutter/labels/p%3A%20rfw) | [![GitHub pull requests by-label](https://img.shields.io/github/issues-pr/flutter/packages/p%3A%20rfw?label=)](https://github.com/flutter/packages/labels/p%3A%20rfw) |