Remove unused variable in the gridmanager.
Don't try proxy refresh when talking to the blahp over ssh. #3531

The ft-gahp doesn't support delegating a refreshed proxy, so there's no
way to get the new proxy to the blahp.
Don't refresh batch job proxies on gridmanager restart. #3531

Set ATTR_DELEGATED_PROXY_EXPIRATION in the job ad for grid-type batch
jobs. Then, we don't have to do a proxy refresh to the blahp on restart
unless it's actually necessary.
We already do this for some other types of grid jobs.