I have many empty savegroups (no clients in it) and wan't to delete them.
But they are configured in a NSR pool resource.
It is possible to remove one group from the pool configuration with nsradmin, so that I can write a script for this.
There is an "append" and "update" command in nsradmin, but no "remove"
Correct - there is no 'remove'. Use 'update' and do not state the attribute that you want to remove.
Unfortunately this means that you have to repeat a longer list of attributes all the time but omit the one you want to delete.
Using the Admin GUI would be much easier but obviously this is not an option.