Generate expected schemata for Releeph

Summary:
Ref T1191.

• This drops two tables.
• Both tables were migrated to transactions a very long time ago and no longer have readers or writers.

Test Plan: Saw ~150 fewer warnings.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T1191

Differential Revision: https://secure.phabricator.com/D10576