Remove GDAL 1 from Mapit
Remove GDAL 1 from Mapit

We should be using GDAL 2.4.4 but are still installing GDAL 1 on
the Mapit machines.
Ensuring this package is set to `absent` should prevent it from
being installed.

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