8 files declare their use of QueuersServiceInterface in Purge 8.3

DashboardController.php in modules/purge_ui/src/Controller/DashboardController.php

PurgeBlockForm.php in modules/purge_ui/src/Form/PurgeBlockForm.php

QueueCommands.php in modules/purge_drush/src/Commands/QueueCommands.php

QueuerAddForm.php in modules/purge_ui/src/Form/QueuerAddForm.php

QueuerCommands.php in modules/purge_drush/src/Commands/QueuerCommands.php

QueuerDeleteForm.php in modules/purge_ui/src/Form/QueuerDeleteForm.php

QueuerFormController.php in modules/purge_ui/src/Controller/QueuerFormController.php

QueuersAvailableDiagnosticCheck.php in src/Plugin/Purge/DiagnosticCheck/QueuersAvailableDiagnosticCheck.php