indexer.cli: Drop unused extra alias `--consumer-id` flag
This fails tests in debian stable (python3-click 6.6) [1]
Note:
-
swh-journal also has that pattern in cli (defining an alias for group-id). There is probably no issue with it because it's not tested as in the indexer module though. We should unify there by removing it.
Test Plan
tox
Migrated from D1680 (view on Phabricator)