Unset a variable

[Colin JN Breame]

Hello,

I suspect this is quite a common question but I could not find a 
definative answer in the archives.

Is there a way of unsetting a previously set variable?

e.g.

#unset ($var)

Ive tried using null and also setting a variable to a known null value 
(#set ($var = $utils.getNull()) with no success.  Can anyone help me?

Cheers

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