net: ethernet: mediatek: remove useless code in mtk_poll_tx()

Remove useless local variable _condition_ and the code related.
Signed-off-by: NGustavo A. R. Silva <gustavo@embeddedor.com>
Acked-by: NSean Wang <sean.wang@mediatek.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/mediatek/mtk_eth_soc.c

@@ -1027,7 +1027,6 @@ static int mtk_poll_tx(struct mtk_eth *eth, int budget)
 	unsigned int done[MTK_MAX_DEVS];
 	unsigned int bytes[MTK_MAX_DEVS];
 	u32 cpu, dma;
-	static int condition;
 	int total = 0, i;
 
 	memset(done, 0, sizeof(done));
@@ -1051,10 +1050,8 @@ static int mtk_poll_tx(struct mtk_eth *eth, int budget)
 			mac = 1;
 
 		skb = tx_buf->skb;
-		if (!skb) {
-			condition = 1;
+		if (!skb)
 			break;
-		}
 
 		if (skb != (struct sk_buff *)MTK_DMA_DUMMY_DESC) {
 			bytes[mac] += skb->len;