staging: rtl8192e: Remove undefined function hard_start_xmit

Remove function hard_start_xmit as it is not defined. Equation
!ieee->hard_start_xmit always evaluates to true. When
(*ieee->hard_start_xmit)(txb, dev) == 0 is called the my computer is
freezing.
Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/603a143ba506ca031d7bd70a844b9f080872d601.1683960684.git.philipp.g.hortmann@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8192e/rtllib.h

@@ -1654,13 +1654,6 @@ struct rtllib_device {
 	void (*set_security)(struct net_device *dev,
 			     struct rtllib_security *sec);
 
-	/* Used to TX data frame by using txb structs.
-	 * this is not used if in the softmac_features
-	 * is set the flag IEEE_SOFTMAC_TX_QUEUE
-	 */
-	int (*hard_start_xmit)(struct rtllib_txb *txb,
-			       struct net_device *dev);
-
 	/* Softmac-generated frames (management) are TXed via this
 	 * callback if the flag IEEE_SOFTMAC_SINGLE_QUEUE is
 	 * not set. As some cards may have different HW queues that

drivers/staging/rtl8192e/rtllib_tx.c

@@ -572,8 +572,7 @@ static int rtllib_xmit_inter(struct sk_buff *skb, struct net_device *dev)
 	/* If there is no driver handler to take the TXB, don't bother
 	 * creating it...
 	 */
-	if ((!ieee->hard_start_xmit && !(ieee->softmac_features &
-	   IEEE_SOFTMAC_TX_QUEUE)) ||
+	if (!(ieee->softmac_features & IEEE_SOFTMAC_TX_QUEUE) ||
 	   ((!ieee->softmac_data_hard_start_xmit &&
 	   (ieee->softmac_features & IEEE_SOFTMAC_TX_QUEUE)))) {
 		netdev_warn(ieee->dev, "No xmit handler.\n");
@@ -938,11 +937,6 @@ static int rtllib_xmit_inter(struct sk_buff *skb, struct net_device *dev)
 			dev->stats.tx_bytes += le16_to_cpu(txb->payload_size);
 			rtllib_softmac_xmit(txb, ieee);
 		} else {
-			if ((*ieee->hard_start_xmit)(txb, dev) == 0) {
-				stats->tx_packets++;
-				stats->tx_bytes += le16_to_cpu(txb->payload_size);
-				return 0;
-			}
 			rtllib_txb_free(txb);
 		}
 	}