public function cleanup() {
    $this->say("Removing deprecated files and directories...");
    $this->taskFilesystemStack()
      ->remove([
        "build",
        "docroot/sites/default/settings/apcu_fix.yml",
        "docroot/sites/default/settings/base.settings.php",
        "docroot/sites/default/settings/blt.settings.php",
        "docroot/sites/default/settings/cache.settings.php",
        "docroot/sites/default/settings/filesystem.settings.php",
        "docroot/sites/default/settings/logging.settings.php",
        "docroot/sites/default/settings/travis.settings.php",
        "docroot/sites/default/settings/pipelines.settings.php",
        "docroot/sites/default/settings/tugboat.settings.php",
        "docroot/sites/settings/global.settings.default.php",
        "tests/phpunit/blt",
        "tests/phpunit/Bolt",
        "scripts/blt",
        "scripts/drupal",
        "scripts/drupal-vm",
        "scripts/git-hooks",
        "scripts/release-notes",
        "scripts/tugboat",
        "blt.sh",
        "project.yml",
        "project.local.yml",
        "example.project.local.yml",
        "readme/acsf-setup.md",
        "readme/architecture.md",
        "readme/best-practices.md",
        "readme/deploy.md",
        "readme/dev-workflow.md",
        "readme/features-workflow.md",
        "readme/local-development.md",
        "readme/onboarding.md",
        "readme/project-tasks.md",
        "readme/release-process.md",
        "readme/repo-architecture.md",
        "readme/views.md",
        "drush/policy.drush.inc",
      ])
      ->setVerbosityThreshold(VerbosityThresholdInterface::VERBOSITY_VERBOSE)
      ->run();
  }