Remove Send Message Button on Profile w/ no Conpherence

Summary: Fixes T7847

Test Plan: Uninstall Conpherence

Reviewers: btrahan, epriestley

Reviewed By: epriestley

Subscribers: Korvin, epriestley

Maniphest Tasks: T7847

Differential Revision: https://secure.phabricator.com/D12450