staging: rtl8192e: Remove unused function rtl92e_dm_backup_state()

rtl92e_dm_backup_state() is unused. Remove dead code.
Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/104b248b35b4fda560056fc4ab4ac230dea98d3f.1696266964.git.philipp.g.hortmann@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8192e/rtl8192e/rtl_dm.c

@@ -973,25 +973,6 @@ static void _rtl92e_dm_bb_initialgain_restore(struct net_device *dev)
 	rtl92e_set_bb_reg(dev, UFWP, bMaskByte1, 0x1);
 }
 
-void rtl92e_dm_backup_state(struct net_device *dev)
-{
-	struct r8192_priv *priv = rtllib_priv(dev);
-	u32 bit_mask = bMaskByte0;
-
-	priv->bswitch_fsync  = false;
-
-	if (dm_digtable.dig_algorithm == DIG_ALGO_BY_RSSI)
-		return;
-
-	rtl92e_set_bb_reg(dev, UFWP, bMaskByte1, 0x8);
-	priv->initgain_backup.xaagccore1 = rtl92e_get_bb_reg(dev, rOFDM0_XAAGCCore1, bit_mask);
-	priv->initgain_backup.xbagccore1 = rtl92e_get_bb_reg(dev, rOFDM0_XBAGCCore1, bit_mask);
-	priv->initgain_backup.xcagccore1 = rtl92e_get_bb_reg(dev, rOFDM0_XCAGCCore1, bit_mask);
-	priv->initgain_backup.xdagccore1 = rtl92e_get_bb_reg(dev, rOFDM0_XDAGCCore1, bit_mask);
-	bit_mask  = bMaskByte2;
-	priv->initgain_backup.cca = (u8)rtl92e_get_bb_reg(dev, rCCK0_CCA, bit_mask);
-}
-
 static void _rtl92e_dm_dig_init(struct net_device *dev)
 {
 	struct r8192_priv *priv = rtllib_priv(dev);

drivers/staging/rtl8192e/rtl8192e/rtl_dm.h

@@ -179,7 +179,6 @@ void    rtl92e_dm_txpower_tracking_wq(void *data);
 void rtl92e_dm_cck_txpower_adjust(struct net_device *dev, bool binch14);
 
 void    rtl92e_dm_restore_state(struct net_device *dev);
-void    rtl92e_dm_backup_state(struct net_device *dev);
 void    rtl92e_dm_init_edca_turbo(struct net_device *dev);
 void    rtl92e_dm_rf_pathcheck_wq(void *data);
 void rtl92e_dm_init_txpower_tracking(struct net_device *dev);