Merge renderSingleView() and renderHTMLView()

Summary: They are same because render() returns safe HTML and raw strings are automatically escaped.

Test Plan: None.

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D4909

src/view/layout/PhabricatorHeaderView.php

@@ -44,7 +44,7 @@ final class PhabricatorHeaderView extends AphrontView {
         array(
           'class' => 'phabricator-header-tags',
         ),
-        $this->renderHTMLView($this->tags));
+        $this->renderSingleView($this->tags));
     }
 
     return phutil_tag(