qlge: removing unreachable block of code

Currently the qlge_change_mtu() is never called if the new_mtu is
equal current MTU, due this condition on dev_set_mtu():

        if (new_mtu == dev->mtu)
                return 0;

So, this block of code is never reached and is being removed.
Signed-off-by: Breno Leitao <leitao@linux.vnet.ibm.com>
Signed-off-by: Ron Mercer <ron.mercer@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/qlge/qlge_main.c

@@ -4123,9 +4123,6 @@ static int qlge_change_mtu(struct net_device *ndev, int new_mtu)
 		QPRINTK(qdev, IFUP, ERR, "Changing to jumbo MTU.\n");
 	} else if (ndev->mtu == 9000 && new_mtu == 1500) {
 		QPRINTK(qdev, IFUP, ERR, "Changing to normal MTU.\n");
-	} else if ((ndev->mtu == 1500 && new_mtu == 1500) ||
-		   (ndev->mtu == 9000 && new_mtu == 9000)) {
-		return 0;
 	} else
 		return -EINVAL;