I just cloned the git.tt-rss.org and they are empty there too … I guess I stand corrected.
I guess I am just baffled why are there in the first place. Since there are not-empty ones right in sql/pgsql/schema.sql and sql/mysql/schema.sql
UPDATE: Just checked git history and blame and seems like it is for some backwards compatibility thing maybe? Anyway, sorry for jumping to conclusions.