synapse/synapse/storage/schema/main/delta/56/remove_tombstoned_rooms_from_directory.sql

/* Copyright 2020 The Matrix.org Foundation C.I.C.
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 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
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 * distributed under the License is distributed on an "AS IS" BASIS,
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 * See the License for the specific language governing permissions and
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-- Now that https://github.com/matrix-org/synapse/pull/6232 is a thing, we can
-- remove old rooms from the directory.
INSERT INTO background_updates (update_name, progress_json) VALUES
  ('remove_tombstoned_rooms_from_directory', '{}');