USB: ohci-sm501: remove unnecessary check of mem

The resource is checked in probe function, so there is
no need do this check in remove function.

Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Link: https://lore.kernel.org/r/20230809085348.2761782-1-yangyingliang@huawei.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>