staging: r8188eu: remove rtw_mfree_sta_priv_lock function

Remove rtw_mfree_sta_priv_lock function from rtw_sta_mgt.c, as it does
nothing and contains an unused variable.
Acked-by: Michael Straube <straube.linux@gmail.com>
Signed-off-by: Phillip Potter <phil@philpotter.co.uk>
Link: https://lore.kernel.org/r/20210810235047.177883-5-phil@philpotter.co.ukSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/r8188eu/core/rtw_sta_mgt.c

@@ -127,13 +127,6 @@ inline struct sta_info *rtw_get_stainfo_by_offset(struct sta_priv *stapriv, int
 	return (struct sta_info *)(stapriv->pstainfo_buf + offset * sizeof(struct sta_info));
 }
 
-static void rtw_mfree_sta_priv_lock(struct sta_priv *pstapriv)
-{
-#ifdef CONFIG_88EU_AP_MODE
-	struct wlan_acl_pool *pacl_list = &pstapriv->acl_list;
-#endif
-}
-
 u32	_rtw_free_sta_priv(struct	sta_priv *pstapriv)
 {
 	struct list_head *phead, *plist;
@@ -162,8 +155,6 @@ u32	_rtw_free_sta_priv(struct	sta_priv *pstapriv)
 		spin_unlock_bh(&pstapriv->sta_hash_lock);
 		/*===============================*/
 
-		rtw_mfree_sta_priv_lock(pstapriv);
-
 		if (pstapriv->pallocated_stainfo_buf)
 			vfree(pstapriv->pallocated_stainfo_buf);
 		}