Another user requested it recently (in fact it was first requested about 2 years ago) so all text and tracks can be removed as of 2014-12-20, so your version of kicad is just a few weeks too old:
timestamp: Sat 2014-12-20 17:13:51 +0100
message:
Add option to VRML Export for Plain PCB (patch from Cirilo Bernardo)
If your copy of SolidWorks has CircuitWorks I would recommend using IDF instead since you have an exact representation of the board. VRML models arcs using line segments so the holes are never really round. The IDF export also eliminates all vias since they are of no importance in the solid model and only add complexity to the model.