Revert "Merge pull request #2387 from gds/aptly_heka_repo"
Revert "Merge pull request #2387 from gds/aptly_heka_repo"

This reverts commit 792817dd0da8386741182083f5c99520460dc845, reversing
changes made to 41773d4ee46c543d482eef2533d844208bba951e.

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