R1:51facbabba91

Deprecating BrowseController and getting rid of unneeded calls to `getTerseSummary()` and `getHumanStatus()`

Summary: Ref T8050, Deprecating BrowseController and getting rid of unneeded calls to `getTerseSummary()` and `getHumanStatus()`

Test Plan: Use calendar, make sure nothing explodes

Reviewers: epriestley, #blessed_reviewers

Reviewed By: epriestley, #blessed_reviewers

Subscribers: Korvin, epriestley

Maniphest Tasks: T8050

Differential Revision: https://secure.phabricator.com/D12791