When you are editing and testing code, it is always best to 'comment out' the code as opposed to actually 'deleting' it. This helps to document your actions and the effect on the active code in the future as well as reverse your actions should you later decide to. If you delete the code you can do neither.

How to Comment out / commenting out code
http://www.boonex.com/unity/answers/entry/Comment_out_commenting_out_code
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