torrus - remove subtree for eqiad-pmtpa link

since we don't have that link anymore

we might want to add a new one for eqiad-codfw though?

Change-Id: Ifbcad5e4c3928ed324c7a3a621bc80f5ae8c333f
Backup /var/lib/carbon/whisper on graphite

Production graphite hosts (role::graphite::production boxes, namely
tungsten) should have whisper databases backed up.

Change-Id: Ic05f64e54abd72ec2a0bab98f89d9b60ad1e378e
RT: 8457
Merge "torrus - remove subtree for eqiad-pmtpa link" into production
Merge "Backup /var/lib/carbon/whisper on graphite" into production