Remove HTML voucher mailers
Problem
In https://gitlab.com/gitlab-org/customers-gitlab-com/-/issues/4298 it was discovered that SFDC is being populated correctly with the text version of the unified voucher emails.
Proposal
Given the use of the text voucher email, remove the HTML voucher mailer to avoid confusion. This should include:
legacy voucher mailer
offline voucher mailer
unified voucher mailer
activation code voucher mailer
cloud license voucher mailer
How will we measure success?
To ensure this is working, we should test that all types of voucher mailers are still appearing in SFDC as expected when the HTML version is removed prior to full deletion.
Edited by Amparo Luna