staging: rtl8192e: Remove function _rtl92e_wx_set_lps_awake_interval()

Remove function _rtl92e_wx_set_lps_awake_interval() as this functionality
is not commonly used and the tool to access it is deprecated.
Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/f0bce7933d3d3761ddc42ba64a4ce46827bd3304.1696548527.git.philipp.g.hortmann@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8192e/rtl8192e/rtl_wx.c

@@ -150,25 +150,6 @@ static int _rtl92e_wx_adapter_power_status(struct net_device *dev,
 	return 0;
 }
 
-static int _rtl92e_wx_set_lps_awake_interval(struct net_device *dev,
-					     struct iw_request_info *info,
-					     union iwreq_data *wrqu,
-					     char *extra)
-{
-	struct r8192_priv *priv = rtllib_priv(dev);
-	struct rt_pwr_save_ctrl *psc = (struct rt_pwr_save_ctrl *)
-					(&priv->rtllib->pwr_save_ctrl);
-
-	mutex_lock(&priv->wx_mutex);
-
-	netdev_info(dev, "%s(): set lps awake interval ! extra is %d\n",
-		    __func__, *extra);
-
-	psc->reg_max_lps_awake_intvl = *extra;
-	mutex_unlock(&priv->wx_mutex);
-	return 0;
-}
-
 static int _rtl92e_wx_set_debug(struct net_device *dev,
 				struct iw_request_info *info,
 				union iwreq_data *wrqu, char *extra)
@@ -950,10 +931,6 @@ static const struct iw_priv_args r8192_private_args[] = {
 		SIOCIWFIRSTPRIV + 0x6,
 		IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1, IW_PRIV_TYPE_NONE,
 		"set_power"
-	}, {
-		SIOCIWFIRSTPRIV + 0xa,
-		IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1, IW_PRIV_TYPE_NONE,
-		"lps_interv"
 	}
 
 };
@@ -966,10 +943,6 @@ static iw_handler r8192_private_handler[] = {
 	(iw_handler)NULL,
 	(iw_handler)NULL,
 	(iw_handler)_rtl92e_wx_adapter_power_status,
-	(iw_handler)NULL,
-	(iw_handler)NULL,
-	(iw_handler)NULL,
-	(iw_handler)_rtl92e_wx_set_lps_awake_interval,
 };
 
 static struct iw_statistics *_rtl92e_get_wireless_stats(struct net_device *dev)