igc: Remove set but not used variable 'pci_using_dac'

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/net/ethernet/intel/igc/igc_main.c: In function 'igc_probe':
drivers/net/ethernet/intel/igc/igc_main.c:3535:11: warning:
 variable 'pci_using_dac' set but not used [-Wunused-but-set-variable]

It never used since introduction in commit
d89f88419f99 ("igc: Add skeletal frame for Intel(R) 2.5G Ethernet Controller support")

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Acked-by: Sasha Neftin <sasha.neftin@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 1 insertions, 4 deletions

diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c
index 615a5fcd5a00..529c3e952621 100644
--- a/drivers/net/ethernet/intel/igc/igc_main.c
+++ b/drivers/net/ethernet/intel/igc/igc_main.c
@@ -3532,19 +3532,16 @@ static int igc_probe(struct pci_dev *pdev,
         struct net_device *netdev;
         struct igc_hw *hw;
         const struct igc_info *ei = igc_info_tbl[ent->driver_data];
-        int err, pci_using_dac;
+        int err;
 
         err = pci_enable_device_mem(pdev);
         if (err)
                 return err;
 
-        pci_using_dac = 0;
         err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64));
         if (!err) {
                 err = dma_set_coherent_mask(&pdev->dev,
                                             DMA_BIT_MASK(64));
-                if (!err)
-                        pci_using_dac = 1;
         } else {
                 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
                 if (err) {