Remove expired ports:
2018-11-19 net-mgmt/p5-FusionInventory-Agent-Task-NetDiscovery: No longer needed
net-mgmt/p5-FusionInventory-Agent-Task-SNMPQuery: No longer needed

net-mgmt/p5-FusionInventory-Agent-Task-SNMPQuery was scheduled for removal on 2018-10-22
in r480450 but this note was lost in r481365