[#65878680] Remove govuk_class from /etc/sudoers
[#65878680] Remove govuk_class from /etc/sudoers

The env var was deprecated in 88993ca. We no longer need to allow it to be
passed through sudo.

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