alphagov/whitehall — pull request #529 by tekin (2013-05-01 15:39:02+00:00)
Title: Remove redundant column from historical_accounts

The political_party_id column for historical accounts has been
superseded by political_party_ids (to support floor-crossing
polititions)

Original Tracker story: https://www.pivotaltracker.com/story/show/48664417