Drop deprecated GRMLBASE/93-update-usbids (update-usbids is gone)

Drop deprecated GRMLBASE/93-update-usbids (update-usbids is gone)

update-usbids is no longer available since usbutils v008,
quoting from https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=805330:

| version 008, usbutils doesn't use usb.ids anymore. Instead
| it uses the udev hardware database. usb.ids is now provided by the
| package with the same name, but it doesn't provide any script to update
| it.

Given that usbutils v1:010-3 is available in Debian oldoldstable AKA
buster, there's no point in further shipping our 93-update-usbids
script any longer.