monitor: Remove preliminary property check
As g_udev_device_get_property will already return NULL if there's no such property for the device, and as such it won't match the g_strcmp0.
Splitted from !48 (closed).
As g_udev_device_get_property will already return NULL if there's no such property for the device, and as such it won't match the g_strcmp0.
Splitted from !48 (closed).