By now, the new timeline appears to be widespread in most Facebook profiles: personally, I find it a good idea and aesthetically is not bad ... but maybe not everyone likes! How to return to the old Facebook profile and delete the timeline? Exists and is called Facebook Timeline Single Column.
And 'the need' to use this extension for Google Chrome and Firefox to be precise, it is a little script that eliminate the timeline making our profiles similar to the old one.
You can download it here: