Examples: Clean up. (#31336)

examples/webgl_batch_lod_bvh.html

@@ -98,7 +98,6 @@
 
 				camera = new THREE.PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 0.1, 1000 );
 				camera.position.set( 0, 20, 55 );
-				scene.add( camera );
 
 				//