Removed that unused variable.

http://git.ipfire.org/?p=people/ms/ipfire-2.x.git;a=commitdiff;h=4e2bce180421f90ab45ed71d00d2bbf902c407ee

On Thu, 2012-08-09 at 11:58 +0200, Bernhard Bitsch wrote:
> Why are there settings for chain policy? They are not used and cannot be set by 
> a iptables command, but would be useful.