Cleanup post 25.9.0 release (#9837)

Author: lucassaldanha

CHANGELOG.md

@@ -10,12 +10,5 @@
 ### Breaking Changes
 
 ### Additions and Improvements
-- Enabled, by default, a new attestation pool implementation that improves the attestation packing during block and aggregation production. It can still be disabled by setting `--Xaggregating-attestation-pool-v2-enabled=false` if needed
-- Added `--p2p-discovery-bootnodes-url` CLI option.
-- Updated `LUKSO` configuration with Electra fork scheduled for epoch `190800` (September 17th, 2025, 16:20:00 UTC)
-- Avoid builder validator registration calls potentially delaying block production builder calls.
-- Removed `TTFB_TIMEOUT` and `RESP_TIMEOUT` from the default network configurations in line with https://github.com/ethereum/consensus-specs/pull/4532
 
 ### Bug Fixes
-- Limited the allowed time to wait for fork choice before proceeding with attestation duties, and added a development flag to adjust the timing if required.
-- Allowed voluntary exits to be periodically re-broadcast if they have been submitted locally and they have been in the queue for a long time (2 hours).