Removed forgotten code in lines example.

examples/webgl_custom_attributes_lines.html

@@ -193,8 +193,6 @@
 			renderer = new THREE.WebGLRenderer( { clearColor: 0x050505, clearAlpha: 1, antialias: true } );
 			renderer.setSize( WIDTH, HEIGHT );
 
-			renderer.autoClearColor = false;
-
 			var container = document.getElementById( 'container' );
 			container.appendChild( renderer.domElement );
 
@@ -246,4 +244,4 @@
 
 </body>
 
-</html>
+</html>