Drop the pkgconfig file

We don't export anything, so need to ship it

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Drop two comments mentioning evdev

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
xf86-input-libinput 0.1.2

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