[3.14] gh-119740: Remove obsoleted removal announce for trunc delegation (GH-144622) (GH-144624)

This was done in GH-119743 (3.14).
(cherry picked from commit aa6ed802f20c1ddadf45942d350422d3d4e0bbea)

Co-authored-by: Sergey B Kirpichev <skirpichev@gmail.com>