message: Remove unnecessary customMask code.
diff: @@ -53,11 +53,6 @@ using namespace CesiumGltf;
  static uint32_t nextMaterialId = 0;
  -struct CustomMask {
  - std::string name;
  - CesiumTextureUtility::LoadedTextureResult* loadTextureResult;
  -};
  -
  struct LoadModelResult {
  FCesiumMetadataPrimitive Metadata;
  FStaticMeshRenderData* RenderData;
  @@ -79,7 +74,6 @@ struct LoadModelResult {
  CesiumTextureUtility::LoadedTextureResult* emissiveTexture;
  CesiumTextureUtility::LoadedTextureResult* occlusionTexture;
  CesiumTextureUtility::LoadedTextureResult* waterMaskTexture;
  - std::vector<CustomMask> customMaskTextures;
  std::unordered_map<std::string, uint32_t> textureCoordinateParameters;
  bool onlyLand;
  