user_stats_historical does not exist

[felixx9]

docs here: synapse/docs/usage/administration/useful_sql_for_admins.md

or here

https://matrix-org.github.io/synapse/latest/usage/administration/useful_sql_for_admins.html#show-top-20-users-on-homeserver-by-sent-events-messages-at-last-month

fires a select on table user_stats_historical, but this table seem not to exist.
would be a very helpful select, though, if we have a spam problem

[dklimpel]

This feature was removed

• Remove functionality associated with unused historical stats tables #9721