[Observium] Code to Delete interfaces that match bad_if?

So I spent a lot of time digging through the code to figure out how bad_if works.

I wanted to remove the stacking "ports" there were showing up.

Added this code to my config: $config['bad_if'][] = "stack";

However the ports weren't getting removed. Upon further investigation I found that the current code only prevents the addition of a match. However, if the port is already in the database nothing is done.

Is this the desired behaviour or should ports that match be removed from the database?

~pyther