9 files declare their use of ConfigManagerInterface in Zircon Profile 8

BundleConfigImportValidate.php in core/lib/Drupal/Core/Entity/Event/BundleConfigImportValidate.php

Contains \Drupal\Core\Entity\Event\BundleConfigImportValidate.

ConfigController.php in core/modules/config/src/Controller/ConfigController.php

Contains \Drupal\config\Controller\ConfigController.

ConfigDependencyDeleteFormTrait.php in core/lib/Drupal/Core/Config/Entity/ConfigDependencyDeleteFormTrait.php

Contains \Drupal\Core\Config\Entity\ConfigDependencyDeleteFormTrait.

ConfigSingleImportForm.php in core/modules/config/src/Form/ConfigSingleImportForm.php

Contains \Drupal\config\Form\ConfigSingleImportForm.

ConfigSnapshotSubscriber.php in core/lib/Drupal/Core/EventSubscriber/ConfigSnapshotSubscriber.php

Contains \Drupal\Core\EventSubscriber\ConfigSnapshotSubscriber.

ConfigSync.php in core/modules/config/src/Form/ConfigSync.php

Contains \Drupal\config\Form\ConfigSync.

ModulesUninstallConfirmForm.php in core/modules/system/src/Form/ModulesUninstallConfirmForm.php

Contains \Drupal\system\Form\ModulesUninstallConfirmForm.

QueryFactory.php in core/lib/Drupal/Core/Config/Entity/Query/QueryFactory.php

Contains \Drupal\Core\Config\Entity\Query\QueryFactory.

ThemeInstaller.php in core/lib/Drupal/Core/Extension/ThemeInstaller.php

Contains \Drupal\Core\Extension\ThemeInstaller.