io_uring: kill io_run_task_work_ctx

There is only one user of io_run_task_work_ctx(), inline it.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/40953c65f7c88fb00cdc4d870ca5d5319fb3d7ea.1672916894.git.asml.silence@gmail.com


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