[old discovery] remove ssh_xen
[old discovery] remove ssh_ssg
[old discovery] remove ssh_proxmox
[old discovery] remove ssh_onstor
[old discovery] remove ssh_linux
[old discovery] remove ssh_ibm_bladecenter
[old discovery] remove ssh_hp_p2000
[old discovery] remove ssh_hp_msa
[old discovery] remove ssh_ganeti
[old discovery] remove ssh_cisco_catalyst
[old discovery] remove ssh_cisco_asa
[old discovery] remove ssh_aix
[old discovery] remove ssh_3par
[old discovery] remove software
[old discovery] remove snmp
[old discovery] remove position
[old discovery] remove plugins_check
[old discovery] remove ping
[old discovery] remove mac
[old discovery] remove ipmi