io_uring: remove bogus RLIMIT_NOFILE check in file registration
We already checked this limit when the file was opened, and we keep it
open in the file table. Hence when we added unit_inflight to the count
we want to register, we're doubly accounting these files. This results
in -EMFILE for file registration, if we're at half the limit.
Cc: stable@vger.kernel.org # v5.1+
Signed-off-by: NJens Axboe <axboe@kernel.dk>
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