This was a bad idea. No-one seems to use this and it gives us little benefits.
To even get this feature a number of other features need to be turned off
(like two-finger scrolling and tapping). Many of these are enabled by default,
if they are disabled a client stack with full touchpad gesture support could
in theory support true touchpad gestures. This has never happened.

Drop the touch events from the synaptics driver. This allows us to switch the
touchpad fully over to look like a relative device, thus also removing the
bug that changes the touchpad speed whenever a monitor is added/removed in.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>