vmxnet3: remove unused variable

While doing some backporting I noticed that vmxnet3 had a variable that was set
but never used.  Get rid of it, and stop the compiler from griping

Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
CC: "VMware, Inc." <pv-drivers@vmware.com>
CC: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Bhavesh Davda <bhavesh@vmware.com>
Signed-off-by: David S. Miller <davem@conan.davemloft.net>

drivers/net/vmxnet3/vmxnet3_drv.c

@@ -405,10 +405,8 @@ vmxnet3_tq_cleanup(struct vmxnet3_tx_queue *tq,
 
 	while (tq->tx_ring.next2comp != tq->tx_ring.next2fill) {
 		struct vmxnet3_tx_buf_info *tbi;
-		union Vmxnet3_GenericDesc *gdesc;
 
 		tbi = tq->buf_info + tq->tx_ring.next2comp;
-		gdesc = tq->tx_ring.base + tq->tx_ring.next2comp;
 
 		vmxnet3_unmap_tx_buf(tbi, adapter->pdev);
 		if (tbi->skb) {