staging: rtl8192e: Remove unused variables txov.., txbeokint and txbkokint

txoverflow, txbeokint and txbkokint are initialized and increased but
never read. Remove dead code.
Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/023f612dc35eca3a74c31344f7dbb168180bf437.1674675808.git.philipp.g.hortmann@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8192e/rtl8192e/rtl_core.c

@@ -2181,17 +2181,12 @@ static irqreturn_t _rtl92e_irq(int irq, void *netdev)
 	if (inta & IMR_RXFOVW)
 		tasklet_schedule(&priv->irq_rx_tasklet);
 
-	if (inta & IMR_TXFOVW)
-		priv->stats.txoverflow++;
-
 	if (inta & IMR_BKDOK) {
-		priv->stats.txbkokint++;
 		priv->rtllib->link_detect_info.NumTxOkInPeriod++;
 		_rtl92e_tx_isr(dev, BK_QUEUE);
 	}
 
 	if (inta & IMR_BEDOK) {
-		priv->stats.txbeokint++;
 		priv->rtllib->link_detect_info.NumTxOkInPeriod++;
 		_rtl92e_tx_isr(dev, BE_QUEUE);
 	}

drivers/staging/rtl8192e/rtl8192e/rtl_core.h

@@ -184,9 +184,6 @@ enum reset_type {
 
 struct rt_stats {
 	unsigned long received_rate_histogram[4][32];
-	unsigned long txoverflow;
-	unsigned long txbeokint;
-	unsigned long txbkokint;
 	unsigned long txviokint;
 	unsigned long txvookint;
 	unsigned long txbeaconokint;