Fix munging of `collections_publisher` DB name
Fix munging of `collections_publisher` DB name

The database name `collections_publisher_production` was incorrectly
being transformed into `collections_mguides_development2` because the
regular expression to target `publisher_production` was too broad.

Publisher uses the shared `govuk_content_models` database now, so we
don't need this munging line at all, which fixes the issue.

alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet