kiji-schema: SCHEMA-879. Pom cleanup in Cassandra module.

Profiling profile is no longer.

issue: https://jira.kiji.org/browse/SCHEMA-879
review: https://review.kiji.org/r/2060
commit: https://github.com/kijiproject/kiji-schema/commit/3475a107788500bc8f6de50a1bc2bf71b48936d2