tornevalls-resurs-bank-payment-gateway-for-woocommerce

WOO-857

* Removed references to checkout types.
* Removed all references to RCO in ResursDefault.
* Removed all references to bookSignedPayment.
* Payment method icons now only have one default mode.
* Checkout fields and order button handler removed from filter setup.
* get_title is still in use, but is now cleaned up.
* We no longer need to handle "proper order references".
* getApiRequest has been cleaned up as we no longer have to take height for signed payments, but only callbacks.