Fix errors found by PHPStan

Test Plan: Ran `phpstan analyze -a autoload.php phabricator/src`.

Reviewers: #blessed_reviewers, epriestley

Reviewed By: #blessed_reviewers, epriestley

Subscribers: Korvin, hach-que

Differential Revision: https://secure.phabricator.com/D17371

src/applications/auth/controller/PhabricatorAuthUnlinkController.php

@@ -61,7 +61,7 @@ final class PhabricatorAuthUnlinkController
       return id(new AphrontRedirectResponse())->setURI($this->getDoneURI());
     }
 
-    return $this->renderConfirmDialog($account);
+    return $this->renderConfirmDialog();
   }
 
   private function getDoneURI() {