In T322019 I've prepared the last things to do to be able to remove WebPageTest tests.
Here are the the steps for the actual removal:
Stop the instances and remove the agent and the server instanceRemove the extra disk on AWS (used for logs)Cleanup S3Cleanup data in GraphiteCleanup Wikitech from documentationRemove dashboards in GrafanaUpdate the portal dashboard in Grafana (I missed that before)- Update project in Phabricator: https://www.mediawiki.org/wiki/Phabricator/Project_management#Archiving_a_project