remove unneeded

threejs/threejs-background-cubemap.html

@@ -26,7 +26,6 @@ import {OrbitControls} from './resources/threejs/r119/examples/jsm/controls/Orbi
 function main() {
   const canvas = document.querySelector('#c');
   const renderer = new THREE.WebGLRenderer({canvas});
-  renderer.autoClearColor = false;
 
   const fov = 75;
   const aspect = 2;  // the canvas default