Remove duplicate observer mapping. Fix private keyword indent.
Remove duplicate observer mapping. Fix private keyword indent.

alphagov/manuals-publisher,alphagov/specialist-publisher-rebuild,alphagov/specialist-publisher,alphagov/specialist-publisher,ministryofjustice/specialist-publisher,ministryofjustice/specialist-publisher,alphagov/specialist-publisher-rebuild,alphagov/manuals-publisher,alphagov/specialist-publisher-rebuild,alphagov/manuals-publisher,ministryofjustice/specialist-publisher,alphagov/specialist-publisher-rebuild,alphagov/specialist-publisher,ministryofjustice/specialist-publisher