staging: rtl8723bs: remove rtw_br_ext.h

The header rtw_br_ext.h is not used anywhere.
'git grep rtw_br_ext.h' returns nothing, remove the file.
Signed-off-by: Michael Straube <straube.linux@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8723bs/include/rtw_br_ext.h

-/* SPDX-License-Identifier: GPL-2.0 */
-/******************************************************************************
- *
- * Copyright(c) 2007 - 2011 Realtek Corporation. All rights reserved.
- *
- ******************************************************************************/
-#ifndef _RTW_BR_EXT_H_
-#define _RTW_BR_EXT_H_
-
-#define MACADDRLEN		6
-#define _DEBUG_ERR		DBG_8192C
-#define _DEBUG_INFO		/* DBG_8192C */
-#define DEBUG_WARN		DBG_8192C
-#define DEBUG_INFO		/* DBG_8192C */
-#define DEBUG_ERR		DBG_8192C
-/* define GET_MY_HWADDR		((GET_MIB(priv))->dot11OperationEntry.hwaddr) */
-#define GET_MY_HWADDR(padapter)		((padapter)->eeprompriv.mac_addr)
-
-#define NAT25_HASH_BITS		4
-#define NAT25_HASH_SIZE		(1 << NAT25_HASH_BITS)
-#define NAT25_AGEING_TIME	300
-
-#define MAX_NETWORK_ADDR_LEN	17
-
-struct nat25_network_db_entry
-{
-	struct nat25_network_db_entry	*next_hash;
-	struct nat25_network_db_entry	**pprev_hash;
-	atomic_t						use_count;
-	unsigned char 				macAddr[6];
-	unsigned long					ageing_timer;
-	unsigned char 				networkAddr[MAX_NETWORK_ADDR_LEN];
-};
-
-enum NAT25_METHOD {
-	NAT25_MIN,
-	NAT25_CHECK,
-	NAT25_INSERT,
-	NAT25_LOOKUP,
-	NAT25_PARSE,
-	NAT25_MAX
-};
-
-struct br_ext_info {
-	unsigned int	nat25_disable;
-	unsigned int	macclone_enable;
-	unsigned int	dhcp_bcst_disable;
-	int		addPPPoETag;		/*  1: Add PPPoE relay-SID, 0: disable */
-	unsigned char nat25_dmzMac[MACADDRLEN];
-	unsigned int	nat25sc_disable;
-};
-
-void nat25_db_cleanup(struct adapter *priv);
-
-#endif /*  _RTW_BR_EXT_H_ */