db.out.ogr: Removed unused variable

[arohanajit]

Fixed 841 by removing unused table

[echoix]

That's unexpected, that a module's option isn't used at all

[petrasovaa]

See #4242. For backwards compatibility we probably shouldn't remove an option, even though it's unused. Since the issue is tracked, I am fine with this PR.

[echoix]

There is a bug filed to track that the option isn't used, so it's correct to have this merged