diff --git a/addons/base_calendar/base_calendar.py b/addons/base_calendar/base_calendar.py
index d1b8709e1e9..d560eaacd66 100644
--- a/addons/base_calendar/base_calendar.py
+++ b/addons/base_calendar/base_calendar.py
@@ -1616,36 +1616,6 @@ class calendar_todo(osv.osv):
 
 calendar_todo()
 
-#class ir_attachment(osv.osv):
-#    _name = 'ir.attachment'
-#    _inherit = 'ir.attachment'
-#
-#    def search_count(self, cr, user, args, context=None):
-#        new_args = []
-#        for domain_item in args:
-#            if isinstance(domain_item, (list, tuple)) and len(domain_item) == 3 and domain_item[0] == 'res_id':
-#                new_args.append((domain_item[0], domain_item[1], base_calendar_id2real_id(domain_item[2])))
-#            else:
-#                new_args.append(domain_item)
-#        return super(ir_attachment, self).search_count(cr, user, new_args, context)
-#
-#    def create(self, cr, uid, vals, context=None):
-#        if context:
-#            id = context.get('default_res_id', False)
-#            context.update({'default_res_id' : base_calendar_id2real_id(id)})
-#        return super(ir_attachment, self).create(cr, uid, vals, context=context)
-#
-#    def search(self, cr, uid, args, offset=0, limit=None, order=None,
-#            context=None, count=False):
-#        new_args = []
-#        for domain_item in args:
-#            if isinstance(domain_item, (list, tuple)) and len(domain_item) == 3 and domain_item[0] == 'res_id':
-#                new_args.append((domain_item[0], domain_item[1], base_calendar_id2real_id(domain_item[2])))
-#            else:
-#                new_args.append(domain_item)
-#        return super(ir_attachment, self).search(cr, uid, new_args, offset=offset,
-#                            limit=limit, order=order, context=context, count=False)
-#ir_attachment()
 
 class ir_values(osv.osv):
     _inherit = 'ir.values'