These four should all be gone from Wikibase and from the production config:
- tmpPropertyTermsMigrationStage
- tmpItemTermsMigrationStages
- tmpItemSearchMigrationStage
- tmpPropertySearchMigrationStage
They’re all MIGRATION_NEW by default on master already, so we should be able to drop them from the production config immediately. As a first step, we can replace all their uses in code with a hard-coded MIGRATION_NEW, and then later refactor that code.
Should be removed from docs, defaults and code (usages)