Examples: Clean up

examples/webgl_effects_ascii.html

@@ -87,7 +87,6 @@
 				scene.add( plane );
 
 				renderer = new THREE.WebGLRenderer( { antialias: true } );
-				renderer.setPixelRatio( window.devicePixelRatio );
 				renderer.setSize( window.innerWidth, window.innerHeight );
 
 				effect = new THREE.AsciiEffect( renderer );