The script shown below will catch the vias that were missed in Altium's DRC check.
Download Parts and Scripts Link: Download Parts
Antenna Vias are vias the do not have connections on more than one layer.
Tips:
Pour all polygons before running the script !
If you want to keep the vias then add a fill or connect a track on another layer. Or convert the via to a free thru-hole pad.
After the script is run you can press the delete on your keyboard to remove the Via Antennas.
Or . . .
You can use the PCB List panel to investigate each selected via.
Click on image to view
Download Parts and Scripts Link: Download Parts