net: broadcom: bcm4908enet: remove redundant variable bytes

The variable bytes is being used to summate slot lengths,
however the value is never used afterwards. The summation
is redundant so remove variable bytes.
Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Link: https://lore.kernel.org/r/20211222003937.727325-1-colin.i.king@gmail.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/broadcom/bcm4908_enet.c

@@ -635,7 +635,6 @@ static int bcm4908_enet_poll_tx(struct napi_struct *napi, int weight)
 	struct bcm4908_enet_dma_ring_bd *buf_desc;
 	struct bcm4908_enet_dma_ring_slot *slot;
 	struct device *dev = enet->dev;
-	unsigned int bytes = 0;
 	int handled = 0;
 
 	while (handled < weight && tx_ring->read_idx != tx_ring->write_idx) {
@@ -646,7 +645,6 @@ static int bcm4908_enet_poll_tx(struct napi_struct *napi, int weight)
 
 		dma_unmap_single(dev, slot->dma_addr, slot->len, DMA_TO_DEVICE);
 		dev_kfree_skb(slot->skb);
-		bytes += slot->len;
 		if (++tx_ring->read_idx == tx_ring->length)
 			tx_ring->read_idx = 0;