Phriction - fix error log spew from misconfigured table column classes

Summary: there were 6 values, but we only need 4. delete the two empty ones as the others are all stylistically valid.

Test Plan: ...looks good!

Reviewers: ric03uec, vrana, epriestley

Reviewed By: epriestley

CC: aran, epriestley

Maniphest Tasks: T1247

Differential Revision: https://secure.phabricator.com/D2498