folsom02.sh: do not set computeip twice.

Thanks for putting this together.  I'm trying this on Ubuntu 12.10 and we'll see how it goes.  I'm also trying it on a node with a single physical ethernet.

The deleted code set computeip using $eth1 which isn't set at this point, which was confusing, since my first inclination was to replace eth1 with eth0, which didn't look right for a compute node.