Remove unused ISO and RFC date/time formats
Ideally we'd eventually get rid of this class entirely, KFormat in KF::CoreAddons has the natural language formatting as well meanwhile, the rest is easily doable with vanilla QLocale anyway.
Ideally we'd eventually get rid of this class entirely, KFormat in KF::CoreAddons has the natural language formatting as well meanwhile, the rest is easily doable with vanilla QLocale anyway.