cleanup_old_data.sql: add tables to clean up
cleanup_old_data.sql: add tables to clean up

* player_read_thread
* weighted_random

These are the largest remaining tables that have no usefulness
after a game ends.

hemberger/smr,hemberger/smr,hemberger/smr,hemberger/smr,smrealms/smr,smrealms/smr,smrealms/smr