Remove s_aptmirror.pp
Remove s_aptmirror.pp

s_aptmirror.pp has been replaced by s_pkg_mirror.pp. This commit removes this now defunct file.

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