Because it is 99% sure that doing so will fail and spam the user with
"this beatmap doesn't match the online version" notifications, and
because the map status is "locally modified", they should be pretty
aware of that already. This fixes the primary mode of the failure that
https://github.com/ppy/osu/pull/35173 was attempting to hack around.
This will have regressed somewhere around the time that BSS went live,
because at that point the editor stopped resetting online IDs for
beatmaps that got locally modified, making the `beatmapId <= 0` guards
no longer prevent attempts of submission.
Bartłomiej Dach
2a85f7b7c8