Allow editing macros

Summary: Attempt to edit macro said that there is a name conflict.

Test Plan: Edited macro.

Reviewers: wez, epriestley

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D3644

src/applications/macro/controller/PhabricatorMacroEditController.php

@@ -99,7 +99,6 @@ final class PhabricatorMacroEditController
     }
 
     $form = new AphrontFormView();
-    $form->setAction($this->getApplicationURI('/edit/'));
     $form->setUser($request->getUser());
 
     $form