io_uring/timeout: remove duplicate initialization of the io_timeout list.

In the __io_timeout_prep function, the io_timeout list is initialized
twice, removing the meaningless second initialization.

Signed-off-by: Ruyi Zhang <ruyi.zhang@samsung.com>
Link: https://lore.kernel.org/r/20240411055953.2029218-1-ruyi.zhang@samsung.com


Signed-off-by: Jens Axboe <axboe@kernel.dk>