Revert "io_uring: ensure deferred completions are posted for multishot"

This reverts commit 746e7d28 which is
commit 687b2bae upstream.

Jens writes:
	There's some missing dependencies that makes this not work
	right, I'll bring it back in a series instead.

Link: https://lore.kernel.org/r/906ba919-32e6-4534-bbad-2cd18e1098ca@kernel.dk


Reported-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>