Remove 2.5 from roadmap

roadmap.asciidoc

@@ -24,19 +24,6 @@ As our engineering capacity is limited, we're focusing our efforts on a single r
 i.e. patch releases for the current stable minor release (e.g. 1.2.1.Final) are done in case of critical bug fixes only.
 ====
 
-== 2.5 - December 2023
-
-* MariaDB first-class source connector implementation
-* Continued work on Debezium Operator for Kubernetes
-* Kafka 3.6 support
-* Improvements to OpenLogReplicator Oracle integration
-* Enhanced watermark support for signal table / incremental snapshots
-* Batch support for JDBC sink connector
-* Support for large BSONDocuments with MongoDB 6+
-* Oracle 23 support (preview)
-* Continued improvements to Debezium UI
-* Debezium Server support in Debezium UI (preview)
-
 == 2.6 - March 2024
 
 * Official MariaDB connector