Remove duplicate CHANGELOG entry after rebase onto main.

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: KirillKurdyukov

CHANGELOG.md

@@ -14,7 +14,6 @@
 * Reduce memory usage of query service result sets
 * Update protobufs
 * Fix incompatibility with protobuf 6.30–6.31.0: regenerate v6 stubs with the lowest 6.x gencode floor (6.30.0) instead of 6.31.1
-* Query session attach stream handles `NodeShutdown` and `SessionShutdown` session hints: on `NodeShutdown` the session's node connection is pessimized and the session is retired, on `SessionShutdown` the session is retired without touching the node
 
 ## 3.29.4 ##
 * Fix leaked topic reader stream when close interrupts stream creation during reconnect