Remove timeline from Profile Manage

Summary: Not sure this page is really providing any value, the timeline always says "edited this object" and there is a list of actions. Seems we could move actions back to the profile proper, but they feel very... engineery to me. Or we could fix the timeline stories, but my guess is they aren't useful or we would have gotten such feedback.

Test Plan: Review manage page, timeline is gone. Page is clean.

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Differential Revision: https://secure.phabricator.com/D17230