staging: r8188eu: Remove more empty routines

After removing some empty routines in os_dep/osdep_service.c, new routines
become empty. These include rtw_mfree_stainfo(),
_rtw_free_sta_xmit_priv_lock(), and rtw_mfree_recv_priv_lock.
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Link: https://lore.kernel.org/r/20210805183717.23007-5-Larry.Finger@lwfinger.netSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/r8188eu/core/rtw_recv.c

@@ -96,18 +96,12 @@ int _rtw_init_recv_priv(struct recv_priv *precvpriv, struct adapter *padapter)
 	return res;
 }
 
-static void rtw_mfree_recv_priv_lock(struct recv_priv *precvpriv)
-{
-}
-
 void _rtw_free_recv_priv (struct recv_priv *precvpriv)
 {
 	struct adapter	*padapter = precvpriv->adapter;
 
 	rtw_free_uc_swdec_pending_queue(padapter);
 
-	rtw_mfree_recv_priv_lock(precvpriv);
-
 	rtw_os_recv_resource_free(precvpriv);
 
 	vfree(precvpriv->pallocated_frame_buf);

drivers/staging/r8188eu/core/rtw_sta_mgt.c

@@ -127,24 +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));
 }
 
-void	_rtw_free_sta_xmit_priv_lock(struct sta_xmit_priv *psta_xmitpriv);
-void	_rtw_free_sta_xmit_priv_lock(struct sta_xmit_priv *psta_xmitpriv)
-{
-}
-
-static void	_rtw_free_sta_recv_priv_lock(struct sta_recv_priv *psta_recvpriv)
-{
-}
-
-void rtw_mfree_stainfo(struct sta_info *psta);
-void rtw_mfree_stainfo(struct sta_info *psta)
-{
-
-	_rtw_free_sta_xmit_priv_lock(&psta->sta_xmitpriv);
-	_rtw_free_sta_recv_priv_lock(&psta->sta_recvpriv);
-
-}
-
 static void rtw_mfree_sta_priv_lock(struct sta_priv *pstapriv)
 {
 #ifdef CONFIG_88EU_AP_MODE