5 files for MySql/Sqlite/Postgres.
MysqlUpdater.php seems to have incorrect comment for 1.26 release
The hitcounter table was dropped in 1.25 (I0e5006a), so all the
files dropped here are part of schema change for 1.25.
Bug: T272199
Change-Id: I6a509a54d31f68e423b3d76d26259b1f88aa22bd