Before this commit, the FlexCheckout API was used to process validation
operations only. It proved itself to be:
- unusable without making small payments with immediate refunds
- badly suited to PSD2 due to its Merchant Initiated Transactions (MIT)
- not worth the maintenance cost tied to its complexity given the simple
flow that it implements
- inconvenient to integrate to standard payment flows
- poorly customizable in regard to the hosted tokenization page
This commit thus removes it entirely and drops Ogone's support for
validation operations with it.
task-2494916
Antoine Vandevenne (anv)
a5bdad89f2