The GettingStarted extension was undeployed (and so all of its instruments were undeployed) in T235752: Undeploy the GettingStarted extension.
- Remove all mentions of the GettingStarted* schemas from all repos
- Mark the schema as inactive by editing the SchemaDoc template on the schema's talk page
- Remove the GettingStarted* event sanitisation allowlist entries
- Determine if already sanitised data should be deleted
- If necessary, request the deletion of any previously sanitised data