message: gltfpack: Remove KHR_image_ktx2 extension
  The intention for the standardization process is to only require
  KHR_texture_basisu which would imply support for image/ktx2.
diff: @@ -4209,7 +4209,6 @@ void process(cgltf_data* data, const char* input_path, const char* output_path,
  {"KHR_materials_pbrSpecularGlossiness", ext_pbr_specular_glossiness, false},
  {"KHR_materials_unlit", ext_unlit, false},
  {"KHR_lights_punctual", data->lights_count > 0, false},
  - {"KHR_image_ktx2", !json_textures.empty() && settings.texture_ktx2, true},
  {"KHR_texture_basisu", !json_textures.empty() && settings.texture_ktx2, true},
  };
  