MC-30393: De-couple Cybersource payment methods integrations from core in 2.4.0

Author: zakdma

app/code/Magento/Signifyd/etc/signifyd_payment_mapping.xml

@@ -70,10 +70,6 @@
             <magento_code>eway</magento_code>
             <signifyd_code>PAYMENT_CARD</signifyd_code>
         </payment_method>
-        <payment_method name="cybersource">
-            <magento_code>cybersource</magento_code>
-            <signifyd_code>PAYMENT_CARD</signifyd_code>
-        </payment_method>
         <payment_method name="free">
             <magento_code>free</magento_code>
             <signifyd_code>FREE</signifyd_code>