fix plek env variable
fix plek env variable

whitehall_api and email alert api plek entries are now managed in govuk/manifests/deploy/config.pp. We need to remove these here or otherwise, the resource will be duplicated.

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