8 files declare their use of MenuLinkManagerInterface in Zircon Profile 8

MenuDeleteForm.php in core/modules/menu_ui/src/Form/MenuDeleteForm.php

Contains \Drupal\menu_ui\Form\MenuDeleteForm.

MenuForm.php in core/modules/menu_ui/src/MenuForm.php

Contains \Drupal\menu_ui\MenuForm.

MenuLinkContentDeriver.php in core/modules/menu_link_content/src/Plugin/Deriver/MenuLinkContentDeriver.php

Contains \Drupal\menu_link_content\Plugin\Deriver\MenuLinkContentDeriver.

MenuLinkDefaultForm.php in core/lib/Drupal/Core/Menu/Form/MenuLinkDefaultForm.php

Contains \Drupal\Core\Menu\Form\MenuLinkDefaultForm.

MenuLinkPluginConverter.php in core/lib/Drupal/Core/ParamConverter/MenuLinkPluginConverter.php

Contains \Drupal\Core\ParamConverter\MenuLinkPluginConverter.

MenuLinkResetForm.php in core/modules/menu_ui/src/Form/MenuLinkResetForm.php

Contains \Drupal\menu_ui\Form\MenuLinkResetForm.

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

Contains \Drupal\Core\EventSubscriber\MenuRouterRebuildSubscriber.

TaxonomyMenuHelper.php in modules/taxonomy_menu/src/TaxonomyMenuHelper.php

Contains Drupal\taxonomy_menu\Controller\TaxonomyMenu.