- remove context injection added 6 years ago
(2dab340717) but apparently never
used, if it's needed in the future it would be much cleaner to
extract the context(s) into a method and allow overriding that
- filter taxes just once, rather than filter then re-add
- also keeps recordset order which is probably useless but can't hurt
closes odoo/odoo#123651
Signed-off-by: William André (wan) <wan@odoo.com>