t7900: clean up some more broken refs
The "incremental-repack task" test replaces the object directory with a known state. As a result, some of our refs point to objects that are not included in that state. Commit 3cf5f221be (t7900: clean up some broken refs, 2021-01-19) cleaned up some of those (that were causing warnings to stderr from the maintenance process). But there are a few more that were missed. These aren't hurting anything for now, but it's certainly an unexpected state to leave the test repository in, and it will become a problem if repack ever gets more picky about broken refs. Let's clean up those additional refs (which are all in refs/remotes, with nothing there that isn't broken), and add an extra "for-each-ref" call to assert that we've got everything. Signed-off-by: Jeff King <peff@peff.net> Reviewed-by: Jonathan Tan <jonathantanmy@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>