The logic in nvme_dev_add to enumerate namespaces was moved to
nvme_dev_scan. When moved, the nn variable is no longer used. This patch
removes it.
Fixes: a5768aai ("NVMe: Automatic namespace rescan")
Signed-off-by: Matias Bjørling <m@bjorling.me>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
 {
        struct pci_dev *pdev = to_pci_dev(dev->dev);
        int res;
-       unsigned nn;
        struct nvme_id_ctrl *ctrl;
        int shift = NVME_CAP_MPSMIN(readq(&dev->bar->cap)) + 12;
 
                return -EIO;
        }
 
-       nn = le32_to_cpup(&ctrl->nn);
        dev->oncs = le16_to_cpup(&ctrl->oncs);
        dev->abort_limit = ctrl->acl + 1;
        dev->vwc = ctrl->vwc;