Remove wiki move explanation in projects

Summary: I assume we've shown this long enough, plus with redesign it's a good time to remove.

Test Plan: reload page, no link

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin, epriestley

Differential Revision: https://secure.phabricator.com/D11394

src/applications/project/application/PhabricatorProjectApplication.php

@@ -87,7 +87,6 @@ final class PhabricatorProjectApplication extends PhabricatorApplication {
         'history/(?P<id>[1-9]\d*)/' => 'PhabricatorProjectHistoryController',
         '(?P<action>watch|unwatch)/(?P<id>[1-9]\d*)/'
           => 'PhabricatorProjectWatchController',
-        'wiki/' => 'PhabricatorProjectWikiExplainController',
       ),
       '/tag/' => array(
         '(?P<slug>[^/]+)/' => 'PhabricatorProjectViewController',