This is the third part of migrating external IDs from ReviewDb to
NoteDb.
This change:
* changes the code to always read external IDs from NoteDb (the
user.readExternalIdsFromGit configuration parameter is removed)
* bumps the database schema version
* deletes the database table for external IDs
Pushing to the refs/meta/external-ids branch is still prevented by a
commit validator. Since all external IDs are now in NoteDb only we
could allow pushing to refs/meta/external-ids. However we would still
like to do validation of the branch content and reject invalid content
(e.g. invalid Git config files, usage of non-existing account IDs
etc.) and such a validator is not implemented yet (but can be
implemented in a follow-up change).
Change-Id: Id9e5574a1d8d82f4f48fbb0b6dadc0e27d138a28
Signed-off-by: Edwin Kempin <ekempin@google.com>
276b8a897f