You could probably notify the courts and advise them that the property you've filed eviction on appears to have been abandoned and submit photos to them showing the state of the unit (empty, but before you move anything out) and they may go ahead and dismiss the case or just speed it up.
Another option if you haven't entered the property yet, you could call the police and inform them you can't reach the occupant and ask them to do a well being check. They will show up and report that the place seems to have been abandoned and should then log it with their office so you have that you can also send to the court. Just know they may ask you to meet them on site to gain access. Make it seem you're concerned about the well being of the tenant(s) otherwise they may not take it to seriously.
Some PD's will not get involved in civil issues if you just ask them to go with you to enter unless there is fear of something criminal having happened, or there is a belief you would be in danger by entering.