staging: rtl8723bs: remove unused variable 'pregistrypriv'

drivers/staging/rtl8723bs/hal/sdio_halinit.c: In function HalRxAggr8723BSdio:
drivers/staging/rtl8723bs/hal/sdio_halinit.c:547:24: warning: variable pregistrypriv set but not used [-Wunused-but-set-variable]
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20200421024145.43576-1-yuehaibing@huawei.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8723bs/hal/sdio_halinit.c

@@ -544,13 +544,9 @@ static void _InitRetryFunction(struct adapter *padapter)
 
 static void HalRxAggr8723BSdio(struct adapter *padapter)
 {
-	struct registry_priv *pregistrypriv;
 	u8 valueDMATimeout;
 	u8 valueDMAPageCount;
 
-
-	pregistrypriv = &padapter->registrypriv;
-
 	valueDMATimeout = 0x06;
 	valueDMAPageCount = 0x06;