chore: remove mentions of schema serde from release notes

Author: trivikr

CHANGELOG.md

@@ -4,8 +4,6 @@
 
 ### Bug Fixes
 
-- Refactored http binding and cbor serializer ([#1659](https://github.com/smithy-lang/smithy-typescript/pull/1659))
-- Added bucketing system to generate schema objects into separate files ([#1672](https://github.com/smithy-lang/smithy-typescript/pull/1672))
 - Fixed event stream serialization when the `@eventStreamPayload` member is a string ([#1674](https://github.com/smithy-lang/smithy-typescript/pull/1674))
 
 ## 0.34.0 (2025-07-30)