Remove deprecated delegation of the int built-in to __trunc__.

[mdickinson]

Python 3.11 deprecated delegation of the int() built-in to __trunc__ (see issue #89140). I haven't seen any evidence of problems arising from that deprecation, and I think it's now safe to remove that delegation for Python 3.14.

Linked PRs

• gh-119740: Remove deprecated trunc delegation #119743
• gh-119740: remove obsoleted removal announce for trunc delegation #144622
• [3.14] gh-119740: Remove obsoleted removal announce for trunc delegation (GH-144622) #144624