staging: rtl8192e: Remove unused variables nic_type and RxPower

Remove unused variables nic_type and RxPower as they are set and never
evaluated.

Signed-off-by: Philipp Hortmann <[e-mail]>
Link: https://lore.kernel.org/r/96f8c089ae[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/staging/rtl8192e/rtl8192e/r8192E_dev.c

···
 		pwdb_all = rtl92e_rx_db_to_percent(rx_pwr_all);
 
 		pstats->RxPWDBAll = precord_stats->RxPWDBAll = pwdb_all;
-		pstats->RxPower = precord_stats->RxPower =	rx_pwr_all;
 		pstats->RecvSignalPower = rx_pwr_all;
 		if (pdrvinfo->RxHT && pdrvinfo->RxRate >= DESC90_RATEMCS8 &&
 		    pdrvinfo->RxRate <= DESC90_RATEMCS15)

drivers/staging/rtl8192e/rtl8192e/rtl_core.c

···
 	};
 	unsigned int count = priv->rxringcount;
 
-	stats.nic_type = NIC_8192E;
-
 	while (count--) {
 		struct rx_desc *pdesc = &priv->rx_ring
 					[priv->rx_idx];

drivers/staging/rtl8192e/rtllib.h

···
 	u8  control;
 	u8  mask;
 	u16 len;
-	u8  nic_type;
 	u16 Length;
 	u8  SignalQuality;
 	s32 RecvSignalPower;
-	s8  RxPower;
 	u8  SignalStrength;
 	u16 bHwError:1;
 	u16 bCRC:1;