Updated Drupal to 8.6. This goes with the following updates because it's possible...

[yaffs-website] / web / core / modules / comment / config / install / system.action.comment_delete_action.yml

langcode: en
status: true
dependencies:
  module:
    - comment
id: comment_delete_action
label: 'Delete comment'
type: comment
plugin: entity:delete_action:comment
configuration: {  }