Remove weird "Differential Results Table" view

Summary: Ref T8095. This weird grey table has no remaining callsites and can be removed.

Test Plan: Grepped for symbols.

Reviewers: chad, btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T8095

Differential Revision: https://secure.phabricator.com/D13379