libinput: remove evdev_device::devnode

Struct 'evdev_device' has field 'devnode' which is initialized to NULL,
never assigned, and finally free()'d. Therefore it is useless.

Remove the dead field.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>

libweston/libinput-device.c

@@ -596,7 +596,6 @@ evdev_device_destroy(struct evdev_device *device)
 		wl_list_remove(&device->output_destroy_listener.link);
 	wl_list_remove(&device->link);
 	libinput_device_unref(device->device);
-	free(device->devnode);
 	free(device->output_name);
 	free(device);
 }

libweston/libinput-device.h

@@ -47,7 +47,6 @@ struct evdev_device {
 	struct wl_list link;
 	struct weston_output *output;
 	struct wl_listener output_destroy_listener;
-	char *devnode;
 	char *output_name;
 	int fd;
 };