staging: rtl8723bs: remove redundant initialization

The variable ret is being initialized as 0 and is never used until
it's updated by sdio_register_driver()

This removes the redundant initialization of ret

Signed-off-by: Bryan Brattlof <hello@bryanbrattlof.com>
Link: https://lore.kernel.org/r/20210409201235.407671-1-hello@bryanbrattlof.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8723bs/os_dep/sdio_intf.c

@@ -503,7 +503,7 @@ static int rtw_sdio_resume(struct device *dev)
 
 static int __init rtw_drv_entry(void)
 {
-	int ret = 0;
+	int ret;
 
 	DBG_871X_LEVEL(_drv_always_, "module init start\n");
 	dump_drv_version(RTW_DBGDUMP);