staticGet for sub-Managed_DataObject classes now calls parent

The parent class for our database objects, Managed_DataObject, has a
dynamically assigned class in staticGet which objects get put into,
leaving us with less code to do the same thing.

We will probably have to move away from the DB_DataObject 'staticGet'
call as it is nowadays deprecated.

classes/Group_join_queue.php

@@ -14,10 +14,6 @@ class Group_join_queue extends Managed_DataObject
     public $group_id;
     public $created;
 
-    /* Static get */
-    function staticGet($k,$v=null)
-    { return Memcached_DataObject::staticGet('Group_join_queue',$k,$v); }
-
     /* Pkey get */
     function pkeyGet($k)
     { return Memcached_DataObject::pkeyGet('Group_join_queue',$k); }