Last modified: 2013-12-15 12:18:00 UTC
It's hacked in right now as hard-coded strings. Once the fundraiser is over, this should be converted to a proper template with rendering.
The unsubscribe module has been completely rewritten and is no longer a drupal module. Templating was one of the primary requirements. https://gerrit.wikimedia.org/r/#/admin/projects/wikimedia/fundraising/DonationEmailUnsubscribe
[Moving from "CiviCRM/General" to "Wikimedia/CiviCRM; see bug 57738]