message: Cleanup include directives
diff: // This file is distributed under the MIT license.
  // See the LICENSE file for details.
  +#include <cstddef>
  #include <vector>
  -#include <visionaray/math/math.h>
  +#include <visionaray/math/forward.h>
  +#include <visionaray/math/unorm.h>
  +#include <visionaray/math/vector.h>
  #include <visionaray/swizzle.h>
  #include <gtest/gtest.h>
  