Simplify handle rendering in search view

Summary:
Commits don't need special treatment since we have commit summaries. They're cool.

Also, this saves us some queries (I think, not sure).

Test Plan: Searched before and after this patch. Results look cool (the same).

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D5546