Remove the Catalyst ID (is_some) check for non-root registrations (#268)

Author: stanislav-tkach

rust/rbac-registration/src/registration/cardano/mod.rs

@@ -334,9 +334,6 @@ impl RegistrationChainInner {
         let Some(prv_tx_id) = cip509.previous_transaction() else {
             bail!("Empty previous transaction ID");
         };
-        if cip509.catalyst_id().is_some() {
-            bail!("Catalyst id should be present only for chain root registration.");
-        }
         // Previous transaction ID in the CIP509 should equal to the current transaction ID
         // or else it is not a part of the chain
         if prv_tx_id == self.current_tx_id_hash {