genesys: usbhub: Do not claim interface
genesys: usbhub: Do not claim interface

This removes the claim for interface 0; and removes both vfunc open()
and close() that become useless.

Fixes https://github.com/fwupd/fwupd/issues/4730

fwupd/fwupd,fwupd/fwupd,fwupd/fwupd,fwupd/fwupd