erp5_oauth2_authorisation: remove non-implemented method from docstring

5 jobs for for-mr-mouse in 0 seconds
Status Job ID Name Coverage
  External
failed ERP5.Master.UnitTest-Titouan.TestRunner.Mouse

11:47:39

failed ERP5.Master.UnitTest-Titouan.TestRunner.Mouse

15:41:57

failed ERP5.Master.UnitTest-Titouan.TestRunner.Mouse

08:02:24

failed ERP5.Master.UnitTest-Titouan.TestRunner.Mouse

11:01:15

failed ERP5.Master.UnitTest-Titouan.TestRunner.Mouse

10:41:20