Prevent object from casting shadow in Eevee How do?
One answer says to set Shadow Mode to none in the settings of the material, but this doesn't work in this case for some reason. The light is spot.
FOR EEVEE:

make a material for the object and go to material properties > setting > shadow mode > none

Edit: Use contact shadows for small distances. if you want good shadows make the clips start of the light smaller and shadow resolution higher!
contact shadows are only for very small details that resolution of shadow map can't cover.