Remove the following configuration options in the 'quota' group
because they have not been used any more
since Ie01ab1c3a1219f1d123f0ecedc66a00dfb2eb2c1.
- reservation_expire
- until_refresh
- max_age
Change-Id: I56401daa8a2eee5e3aede336b26292f77cc0edd6