quirks: remove the multiplier for the Lenovo UltraNav SK-8845

Looks like this isn't needed, see #112. Or Lenovo re-used USB IDs for this
device in which case we'll have to figure out some other solution once someone
complains.

Fixes https://gitlab.freedesktop.org/libinput/libinput/issues/112



Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>