message: remove remnants of when we had a depth preps
  DEPTH_PREPASS is never set, not need to check for it.
diff: // Attributes and uniforms
  //------------------------------------------------------------------------------
  -#if !defined(DEPTH_PREPASS)
  LAYOUT_LOCATION(4) in highp vec3 vertex_worldPosition;
  -#endif
  #if defined(HAS_ATTRIBUTE_TANGENTS)
  LAYOUT_LOCATION(5) SHADING_INTERPOLATION in mediump vec3 vertex_worldNormal;
  