diff --git a/addons/base_calendar/base_calendar.py b/addons/base_calendar/base_calendar.py
index fcf13ec536e..297fc68be58 100644
--- a/addons/base_calendar/base_calendar.py
+++ b/addons/base_calendar/base_calendar.py
@@ -1747,57 +1747,4 @@ class virtual_report_spool(web_services.report_spool):
 
 virtual_report_spool()
 
-class res_users(osv.osv):
-    _inherit = 'res.users'
-
-    def _get_user_avail(self, cr, uid, ids, context=None):
-        """
-        Get User Availability
-        @param self: The object pointer
-        @param cr: the current row, from the database cursor,
-        @param uid: the current user's ID for security checks,
-        @param ids: List of res user's IDs.
-        @param context: A standard dictionary for contextual values
-        """
-
-        current_datetime = datetime.now().strftime('%Y-%m-%d %H:%M:%S')
-        res = {}
-        attendee_obj = self.pool.get('calendar.attendee')
-        attendee_ids = attendee_obj.search(cr, uid, [
-                    # ('event_date', '<=', current_datetime), ('event_end_date', '<=', current_datetime),
-                    ('state', '=', 'accepted'), ('user_id', 'in', ids)
-                    ])
-
-        for attendee_data in attendee_obj.read(cr, uid, attendee_ids, ['user_id']):
-            user_id = attendee_data['user_id']
-            status = 'busy'
-            res.update({user_id:status})
-
-        #TOCHECK: Delegated Event
-        for user_id in ids:
-            if user_id not in res:
-                res[user_id] = 'free'
-
-        return res
-
-    def _get_user_avail_fun(self, cr, uid, ids, name, args, context=None):
-        """
-        Get User Availability Function
-        @param self: The object pointer
-        @param cr: the current row, from the database cursor,
-        @param uid: the current user's ID for security checks,
-        @param ids: List of res user's IDs.
-        @param context: A standard dictionary for contextual values
-        """
-
-        return self._get_user_avail(cr, uid, ids, context=context)
-
-    _columns = {
-            'availability': fields.function(_get_user_avail_fun, type='selection', \
-                    selection=[('free', 'Free'), ('busy', 'Busy')], \
-                    string='Free/Busy'),
-    }
-
-res_users()
-
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