staging: rtl8723bs: Fix Unneeded variable: "ret". Return "0"

coccicheck reported Unneeded variable ret at rtl8723bs/core/rtw_ap.c:1400.
Function "rtw_acl_remove_sta" always returns 0. Modified return type of the
function to void.
Signed-off-by: Shobhit Kukreti <shobhitkukreti@gmail.com>
Reviewed-by: Bastien Nocera <hadess@hadess.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8723bs/core/rtw_ap.c

@@ -1394,10 +1394,9 @@ int rtw_acl_add_sta(struct adapter *padapter, u8 *addr)
 	return ret;
 }
 
-int rtw_acl_remove_sta(struct adapter *padapter, u8 *addr)
+void rtw_acl_remove_sta(struct adapter *padapter, u8 *addr)
 {
 	struct list_head	*plist, *phead;
-	int ret = 0;
 	struct rtw_wlan_acl_node *paclnode;
 	struct sta_priv *pstapriv = &padapter->stapriv;
 	struct wlan_acl_pool *pacl_list = &pstapriv->acl_list;
@@ -1438,7 +1437,6 @@ int rtw_acl_remove_sta(struct adapter *padapter, u8 *addr)
 
 	DBG_871X("%s, acl_num =%d\n", __func__, pacl_list->num);
 
-	return ret;
 }
 
 u8 rtw_ap_set_pairwise_key(struct adapter *padapter, struct sta_info *psta)

drivers/staging/rtl8723bs/include/rtw_ap.h

@@ -19,7 +19,7 @@ int rtw_check_beacon_data(struct adapter *padapter, u8 *pbuf,  int len);
 void rtw_ap_restore_network(struct adapter *padapter);
 void rtw_set_macaddr_acl(struct adapter *padapter, int mode);
 int rtw_acl_add_sta(struct adapter *padapter, u8 *addr);
-int rtw_acl_remove_sta(struct adapter *padapter, u8 *addr);
+void rtw_acl_remove_sta(struct adapter *padapter, u8 *addr);
 
 u8 rtw_ap_set_pairwise_key(struct adapter *padapter, struct sta_info *psta);
 int rtw_ap_set_group_key(struct adapter *padapter, u8 *key, u8 alg, int keyid);

drivers/staging/rtl8723bs/os_dep/ioctl_linux.c

@@ -4174,7 +4174,8 @@ static int rtw_ioctl_acl_remove_sta(struct net_device *dev, struct ieee_param *p
 		return -EINVAL;
 	}
 
-	return rtw_acl_remove_sta(padapter, param->sta_addr);
+	rtw_acl_remove_sta(padapter, param->sta_addr);
+	return 0;
 
 }