io_uring: remove extra io_commit_cqring()

We don't post events in __io_commit_cqring_flush() anymore but send all
requests to tw, so no need to do io_commit_cqring() there.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/f2481e32375e749be89c42e4804268b608722cef.1655637157.git.asml.silence@gmail.com


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