staging: rtl8192e: Remove unused variable rfc_txpowertrackingindex

rfc_txpowertrackingindex is initialized to 0 and unchanged. Remove dead
code.
Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/20a1f7b8297e93e2f0e593f3ddd772ff10d1fecb.1696266965.git.philipp.g.hortmann@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8192e/rtl8192e/rtl_core.c

@@ -752,7 +752,6 @@ static void _rtl92e_init_priv_variable(struct net_device *dev)
 	priv->bcck_in_ch14 = false;
 	priv->cck_present_attn = 0;
 	priv->rfa_txpowertrackingindex = 0;
-	priv->rfc_txpowertrackingindex = 0;
 	priv->cck_pwr_enl = 6;
 	memset(priv->rtllib->swcamtable, 0, sizeof(struct sw_cam_table) * 32);
 	priv->rx_ctr = 0;

drivers/staging/rtl8192e/rtl8192e/rtl_core.h

@@ -344,7 +344,6 @@ struct r8192_priv {
 	u8		rfa_txpowertrackingindex;
 	u8		rfa_txpowertrackingindex_real;
 	u8		rfa_txpowertracking_default;
-	u8		rfc_txpowertrackingindex;
 	bool		btxpower_tracking;
 	bool		bcck_in_ch14;