kiji-schema: SCHEMA-743. Revert accidental wrong code from SCHEMA-740

issue: https://jira.kiji.org/browse/SCHEMA-743
review: https://review.kiji.org/r/1780
commit: https://github.com/kijiproject/kiji-schema/commit/188f02f9772063f1e186dc6dd075523d2a5bbc5b