io_uring: remove redundant variable pointer nxt and io_wq_assign_next call
An earlier commit "io_uring: remove @nxt from handlers" removed the setting of pointer nxt and now it is always null, hence the non-null check and call to io_wq_assign_next is redundant and can be removed. Addresses-Coverity: ("'Constant' variable guard") Reviewed-by: NChaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Signed-off-by: NColin Ian King <colin.king@canonical.com> Signed-off-by: NJens Axboe <axboe@kernel.dk>
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