Remove PagerDuty drill from Carrenza
Remove PagerDuty drill from Carrenza

This commit disables the PagerDuty drill on Carrenza, since it is now running in AWS and we don’t want two drills.

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