kiji-model-repository: KIJIREPO-65. Remove unused KijiScannerOptions

issue: https://jira.kiji.org/browse/KIJIREPO-65
review: https://review.kiji.org/r/2032
commit: https://github.com/kijiproject/kiji-model-repository/commit/d7e51a65633be0fdf29510d52f4691b35d546071