Remove redundant administrator requirement from application edit policy page

Summary:
Fixes T7485. Before applications had proper policies, we gated access by requiring the viewer be an administrator.

This is now redundant (CAN_EDIT on applications has the same effect, and performs the same check), and may some day be wrong (we might let administrators configure a different policy to control who can configure applications). Today, it gets the policy dialog wrong.

Test Plan:
Clicked "Edit Policies" as a non-administrator, was unable to, got nice error:

{F346598}

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T7485

Differential Revision: https://secure.phabricator.com/D12125

src/applications/meta/controller/PhabricatorApplicationEditController.php

@@ -3,10 +3,6 @@
 final class PhabricatorApplicationEditController
   extends PhabricatorApplicationsController {
 
-  public function shouldRequireAdmin() {
-    return true;
-  }
-
   public function handleRequest(AphrontRequest $request) {
     $user = $request->getUser();
     $application = $request->getURIData('application');