Revert "New extra language for wikidata: Ottoman Turkish (ota)"

it's not really working as it should (e.g. not in ULS,
can't set label etc for it, not handled as RTL lang)

we should investigate and perhaps re-enable on test.wikidata first

This reverts commit f1aa003bc330c6633f7f8a31accc7f20234d7257.

Change-Id: Id0dea6e40ed9ce18cdd58c0de4323e125a68dae0
Merge "Revert "New extra language for wikidata: Ottoman Turkish (ota)""