Remove the mapit node and app from the Carrenza hieradata
Remove the mapit node and app from the Carrenza hieradata

As Mapit has been migrated to AWS. The relevant machines have been
turned off.

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