fix: Remove now-unused transition function. Fixes #2762.

generated_types/src/database_rules.rs

@@ -129,16 +129,6 @@ pub fn decode_persisted_database_rules(
     prost::Message::decode(bytes)
 }
 
-/// TEMPORARY FOR TRANSITION PURPOSES - if decoding rules file as `PersistedDatabaseRules` (which
-/// includes the database UUID) fails, use this to try instead to decode as `DatabaseRules`. Then
-/// next time the database rules are updated, the rules file will be writted as
-/// `PersistedDatabaseRules`.
-pub fn decode_database_rules(
-    bytes: prost::bytes::Bytes,
-) -> Result<management::DatabaseRules, DecodeError> {
-    prost::Message::decode(bytes)
-}
-
 /// Encode database rules into a serialized format suitable for storage in object store
 pub fn encode_persisted_database_rules(
     rules: &management::PersistedDatabaseRules,