Before this commit, the payment function `_get_validation_amount` was overridden by Stripe to specify a validation amount of one currency unit while that amount was in fact never passed to Stripe in the validation flow. The amount stored on the transaction was therefore incorrect. This commits removes the override to let the default amount of 0 being set on validation transactions. task-2612977 closes odoo/odoo#74543 Signed-off-by: Antoine Vandevenne (anv) <AntoineVDV@users.noreply.github.com>