Merge pull request #406 from RayTracing/fix-405

NextWeek: Remove spurious decl bounding_box()

Author: hollasch

books/RayTracingTheNextWeek.html

@@ -171,7 +171,6 @@
             {};
 
             virtual bool hit(const ray& r, double tmin, double tmax, hit_record& rec) const;
-            virtual bool bounding_box(double t0, double t1, aabb& output_box) const;
 
             vec3 center(double time) const;