Merge branch 'af_unix-remove-io_uring-dead-code-in-gc'

Kuniyuki Iwashima says:

====================
af_unix: Remove io_uring dead code in GC.

I will post another series that rewrites the garbage collector for
AF_UNIX socket.

This is a prep series to clean up changes to GC made by io_uring but
now not necessary.
====================

Link: https://lore.kernel.org/r/20240129190435.57228-1-kuniyu@amazon.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>