Re: [PATCH 06/12] odb: remove infrastructure to register submodule sources

Patrick Steinhardt [off-list ref] writes:

The preceding commits have removed the last two users of
`odb_add_submodule_source_by_path()`. The mechanism was only ever
meant as a transitional crutch while migrating submodule object
access away from "add the submodule ODB as an alternate of
the_repository" towards explicitly passing the submodule repository,
see a35e03dee0 (submodule: lazily add submodule ODBs as alternates,
2021-08-16). Remove it.

Yay.  Very nice.