Move budget outside of the core

The budget planning feature is now a plugin
See: https://github.com/kanboard/plugin-budget

app/Model/Acl.php

@@ -64,7 +64,6 @@ class Acl extends Base
         'export' => '*',
         'project' => array('edit', 'update', 'share', 'integration', 'users', 'alloweverybody', 'allow', 'setowner', 'revoke', 'duplicate', 'disable', 'enable'),
         'swimlane' => '*',
-        'budget' => '*',
         'gantt' => array('project', 'savetaskdate', 'task', 'savetask'),
     );