staging: r8188eu: remove unneeded variable in rtw_wx_get_enc

Remove unneeded return variable that is initialized to 0 and not
assigned after.

Found using Coccinelle
Signed-off-by: Abdun Nihaal <abdun.nihaal@gmail.com>
Link: https://lore.kernel.org/r/e31a2b15673497cbd70bf62b0093f46952cc7596.1643466748.git.abdun.nihaal@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/r8188eu/os_dep/ioctl_linux.c

@@ -1717,7 +1717,7 @@ static int rtw_wx_get_enc(struct net_device *dev,
 			    struct iw_request_info *info,
 			    union iwreq_data *wrqu, char *keybuf)
 {
-	uint key, ret = 0;
+	uint key;
 	struct adapter *padapter = (struct adapter *)rtw_netdev_priv(dev);
 	struct iw_point *erq = &wrqu->encoding;
 	struct	mlme_priv	*pmlmepriv = &padapter->mlmepriv;
@@ -1778,7 +1778,7 @@ static int rtw_wx_get_enc(struct net_device *dev,
 	}
 
 
-	return ret;
+	return 0;
 }
 
 static int rtw_wx_get_power(struct net_device *dev,