lei q: drop "oid" output format

lei q: drop "oid" output format

The default deduplication command-line arguments would be
non-sensical for such an option and probably confusing.  It
doesn't seem worth the code to support OID-only output when it's
easy enough to use one of the JSON formats to extract the same
info.

We also don't have OIDs if using remotes, and the
to-be-implemented memoization will be optional.