remove visual shape from CPU/TinyRenderer with removeBody

(thanks to Jeff Bingham for reporting the bug!)

examples/Importers/ImportURDFDemo/LinkVisualShapesConverter.h

@@ -9,6 +9,9 @@ class btCollisionObject;
 struct LinkVisualShapesConverter
 {
 	virtual void convertVisualShapes(int linkIndex, const char* pathPrefix, const btTransform& localInertiaFrame, const UrdfLink* linkPtr, const UrdfModel* model, class btCollisionObject* colShape, int objectIndex) =0;
+	
+	virtual void removeVisualShape(class btCollisionObject* colObj)=0;
+
 };
 
 #endif //LINK_VISUAL_SHAPES_CONVERTER_H