io_uring: remove redundant initialization of variable ret

The variable ret is being initialized with a value that is never read
and it is being updated later with a new value.  The initialization is
redundant and can be removed.

Addresses-Coverity: ("Unused value")
Fixes: b63534c4 ("io_uring: re-issue block requests that failed because of resources")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

fs/io_uring.c

@@ -2796,7 +2796,7 @@ static void io_complete_rw_common(struct kiocb *kiocb, long res,
 static bool io_resubmit_prep(struct io_kiocb *req)
 {
 	struct iovec inline_vecs[UIO_FASTIOV], *iovec = inline_vecs;
-	int rw, ret = -ECANCELED;
+	int rw, ret;
 	struct iov_iter iter;
 
 	/* already prepared */