Updated to Drupal 8.5. Core Media not yet in use.

[yaffs-website] / web / modules / contrib / media_entity / config / install / system.action.media_unpublish_action.yml

langcode: en
status: true
dependencies:
  module:
    - media_entity
id: media_unpublish_action
label: 'Unpublish media'
type: media
plugin: media_unpublish_action
configuration: {  }