staging: rtl8192e: Remove unused _rtl92e_wx_set_sens function

After removal of rf_set_sens variable, the _rtl92e_wx_set_sens function
always returns an error code.
This commit removes the unused function and the respective ioctl.
Suggested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Signed-off-by: Yogesh Hegde <yogi.kernel@gmail.com>
Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/439386d2940fe70ec2092e87211df5e7946aab82.1682358035.git.yogi.kernel@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8192e/rtl8192e/rtl_wx.c

@@ -803,25 +803,6 @@ static int _rtl92e_wx_get_retry(struct net_device *dev,
 	return 0;
 }
 
-static int _rtl92e_wx_set_sens(struct net_device *dev,
-			       struct iw_request_info *info,
-			       union iwreq_data *wrqu, char *extra)
-{
-	struct r8192_priv *priv = rtllib_priv(dev);
-
-	short err = 0;
-
-	if (priv->hw_radio_off)
-		return 0;
-
-	mutex_lock(&priv->wx_mutex);
-	err = -1;
-exit:
-	mutex_unlock(&priv->wx_mutex);
-
-	return err;
-}
-
 static int _rtl92e_wx_set_encode_ext(struct net_device *dev,
 				     struct iw_request_info *info,
 				     union iwreq_data *wrqu, char *extra)
@@ -1042,7 +1023,6 @@ static iw_handler r8192_wx_handlers[] = {
 	[IW_IOCTL(SIOCGIWFREQ)] = _rtl92e_wx_get_freq,
 	[IW_IOCTL(SIOCSIWMODE)] = _rtl92e_wx_set_mode,
 	[IW_IOCTL(SIOCGIWMODE)] = _rtl92e_wx_get_mode,
-	[IW_IOCTL(SIOCSIWSENS)] = _rtl92e_wx_set_sens,
 	[IW_IOCTL(SIOCGIWRANGE)] = _rtl92e_wx_get_range,
 	[IW_IOCTL(SIOCSIWAP)] = _rtl92e_wx_set_wap,
 	[IW_IOCTL(SIOCGIWAP)] = _rtl92e_wx_get_wap,