Summary: Ref T4375. We never join this table, so this is a pretty straight find/replace.
Test Plan: Browsed around Calendar, verified that nothing seemed broken. Saw my red dot in other apps.
Reviewers: btrahan, chad
Reviewed By: btrahan
CC: aran
Maniphest Tasks: T4375
Differential Revision: https://secure.phabricator.com/D8145
