staging: rtl8723bs: core: rtw_mlme_ext.c: remove deadcode

'CHECK_EVENT_SEQ' is not defined anywhere, remove the deadcode.
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Link: https://lore.kernel.org/r/20210531140234.3352465-1-yukuai3@huawei.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8723bs/core/rtw_mlme_ext.c

@@ -6006,7 +6006,7 @@ static struct fwevent wlanevents[] = {
 
 u8 mlme_evt_hdl(struct adapter *padapter, unsigned char *pbuf)
 {
-	u8 evt_code, evt_seq;
+	u8 evt_code;
 	u16 evt_sz;
 	uint	*peventbuf;
 	void (*event_callback)(struct adapter *dev, u8 *pbuf);
@@ -6017,19 +6017,8 @@ u8 mlme_evt_hdl(struct adapter *padapter, unsigned char *pbuf)
 
 	peventbuf = (uint *)pbuf;
 	evt_sz = (u16)(*peventbuf&0xffff);
-	evt_seq = (u8)((*peventbuf>>24)&0x7f);
 	evt_code = (u8)((*peventbuf>>16)&0xff);
 
-
-	#ifdef CHECK_EVENT_SEQ
-	/*  checking event sequence... */
-	if (evt_seq != (atomic_read(&pevt_priv->event_seq) & 0x7f)) {
-		pevt_priv->event_seq = (evt_seq+1)&0x7f;
-
-		goto _abort_event_;
-	}
-	#endif
-
 	/*  checking if event code is valid */
 	if (evt_code >= MAX_C2HEVT)
 		goto _abort_event_;