ContentEntityStorageBase::deleteRevision

public ContentEntityStorageBase::deleteRevision($revision_id)

public function deleteRevision($revision_id) {
  /** @var \Drupal\Core\Entity\ContentEntityInterface $revision */
  if ($revision = $this->loadRevision($revision_id)) {
    // Prevent deletion if this is the default revision.
    if ($revision->isDefaultRevision()) {
      throw new EntityStorageException('Default revision can not be deleted');
    }
    $this->invokeFieldMethod('deleteRevision', $revision);
    $this->doDeleteRevisionFieldItems($revision);
    $this->invokeHook('revision_delete', $revision);
  }
}