UPSTREAM: io_uring/rw: remove leftover debug statement

commit 5c61795e upstream.

This debug statement was never meant to go into the upstream release,
kill it off before it ends up in a release. It was just part of the
testing for the initial version of the patch.

Fixes: 2ec33a6c ("io_uring/rw: ensure kiocb_end_write() is always called")
Change-Id: Iee9f436c34cc137a7ab934aafa3aa0c584369418
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Bug: 268174392
(cherry picked from commit e699cce2)
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>