staging:r8188eu: remove prhdr local variable from rtw_free_stainfo function

This variable is unnecessary.
Signed-off-by: Ivan Safonov <insafonov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8188eu/core/rtw_sta_mgt.c

@@ -310,7 +310,6 @@ u32	rtw_free_stainfo(struct adapter *padapter, struct sta_info *psta)
 	/* for A-MPDU Rx reordering buffer control, cancel reordering_ctrl_timer */
 	for (i = 0; i < 16; i++) {
 		struct list_head *phead, *plist;
-		struct recv_frame *prhdr;
 		struct recv_frame *prframe;
 		struct __queue *ppending_recvframe_queue;
 		struct __queue *pfree_recv_queue = &padapter->recvpriv.free_recv_queue;
@@ -327,8 +326,7 @@ u32	rtw_free_stainfo(struct adapter *padapter, struct sta_info *psta)
 		plist = phead->next;
 
 		while (!list_empty(phead)) {
-			prhdr = container_of(plist, struct recv_frame, list);
-			prframe = (struct recv_frame *)prhdr;
+			prframe = container_of(plist, struct recv_frame, list);
 
 			plist = plist->next;