First of all, a year's worth of wifi radiation is no more harmful than the radiation from a 20 minute cell phone call. Radiation from FM radio stations is worse than the radiation from wifi networks, so you should be fine. For more on this, see here: http://www.who.int/peh-emf/publications/facts/fs304/en/index.html
If you still want to remove it, there won't be any problem. However, this will also disable bluetooth. Also, you may void your warranty in doing so.