message: shade_record no longer stores light source
diff: #include <visionaray/math/math.h>
  #include <visionaray/array.h>
  #include <visionaray/shade_record.h>
  -#include <visionaray/point_light.h>
  using namespace visionaray;
  @@ -14,29 +13,29 @@ int main()
  #if defined SHADE_RECORD_UNPACK_FLOAT4
  - shade_record<point_light<float>, simd::float4> sr;
  - array<shade_record<point_light<float>, float>, 4> sr_array = simd::unpack(sr);
  + shade_record<simd::float4> sr;
  + array<shade_record<float>, 4> sr_array = simd::unpack(sr);
  #elif defined SHADE_RECORD_UNPACK_FLOAT8
  #if VSNRAY_SIMD_ISA_GE(VSNRAY_SIMD_ISA_AVX)
  - shade_record<point_light<float>, simd::float8> sr;
  - array<shade_record<point_light<float>, float>, 8> sr_array = simd::unpack(sr);
  + shade_record<simd::float8> sr;
  + array<shade_record<float>, 8> sr_array = simd::unpack(sr);
  #endif
  #elif defined SHADE_RECORD_UNPACK_ILLEGAL_LENGTH
  - shade_record<point_light<float>, simd::float4> sr;
  - array<shade_record<point_light<float>, float>, 8> sr_array = simd::unpack(sr);
  + shade_record<simd::float4> sr;
  + array<shade_record<float>, 8> sr_array = simd::unpack(sr);
  #elif defined SHADE_RECORD_UNPACK_ILLEGAL_INTEGRAL
  - shade_record<point_light<float>, simd::int4> sr;
  + shade_record<simd::int4> sr;
  auto sr_array = simd::unpack(sr);
  #elif defined SHADE_RECORD_UNPACK_SINGLE
  - shade_record<point_light<float>, float> sr;
  + shade_record<float> sr;
  auto sr_array = simd::unpack(sr);
  #endif
  