Remove needBadges from PhabricatorUser

Summary: Ref T12270. We don't really need these, timeline does it's own thing, badges is now a profile page, and hovercards have been removed.

Test Plan: Visit timeline, still see badges, visit my profile page, bask in the warmth of fake awards.

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Maniphest Tasks: T12270

Differential Revision: https://secure.phabricator.com/D17448