Input: xpad - remove unused field in VID/PID table

The list of specific VID/PID combinations for various controllers recently
added a new field "xtype". However, this field isn't used, nor filled in
the table itself, and was likely added by mistake and overlooked during
review.  Since this field isn't used, it's safe to remove.

Signed-off-by: Vicki Pfau <vi@endrift.com>
Link: https://lore.kernel.org/r/20230225012147.276489-3-vi@endrift.com


Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>