Ok, to remove confirmation page on cashondelivery I've used DenisKey's tip ie, I've comented out the following line:
if (Tools::getValue('confirm'))
in modules/cashondelivery/controllers/front/validation.php
And for bankwire I've used Gipielle's, ie change:
{$link->getModuleLink('bankwire', 'payment', [], true)}
TO
{$link->getModuleLink('bankwire', 'validation', [], true)}
but instead of: web/modules/bankwire/views/templates/hook/payment.tpl
I've edited in:
web/themes/*mycustomtheme*/modules/bankwire/views/templates/hook/payment.tpl
I've found that during this editing sometimes this would not work, probably because of cache so try recompile cache and clear browser cache at the same time.
I'm using PS 1.6.0.9 and OnePageCheckout module.
Thank you all for your contribution, especially DenisKey and Gipielle.