Completely uninstall beta applications

Summary: Fixes T2357. In D4529, I recommended we just hide tiles for beta applications on installs without beta apps enabled. However, this creates at least a couple of issues, notably the stuff in T2357. The main app I was concerned wih Config, which we ended up un-beta'ing anyway, so I think this will probably solve more problems than it creates.

Test Plan: Verified routes for beta applications dropped out when beta was disabled. Verified "Customize Applications" no longer shows these applications.

Reviewers: ljalonen, chad

Reviewed By: chad

CC: aran

Maniphest Tasks: T2357

Differential Revision: https://secure.phabricator.com/D4546

src/applications/directory/controller/PhabricatorDirectoryController.php

@@ -22,13 +22,8 @@ abstract class PhabricatorDirectoryController extends PhabricatorController {
     $nav->setBaseURI(new PhutilURI('/'));
 
     $applications = PhabricatorApplication::getAllInstalledApplications();
-    $show_beta =
-      PhabricatorEnv::getEnvConfig('phabricator.show-beta-applications');
 
     foreach ($applications as $key => $application) {
-      if (!$show_beta && $application->isBeta()) {
-        unset($applications[$key]);
-      }
       if (!$application->shouldAppearInLaunchView()) {
         // Remove hidden applications (usually internal stuff).
         unset($applications[$key]);