Don't version_check metadata db
Created by: james-monkeyshines
Description
The metadata database is unversioned, and exists apart from the release cycle. So the version check is not required.
Use case
Loading the metadata db in the registry gives warnings about a missing db version.
Benefits
Incorrect warnings are removed.
Possible Drawbacks
None
Testing
No new test, it's a minor change. registry.t passes.