remove grosley (decom)

RT #6166

already shut down and removed
from dhcp,dsh,backup,..

pending disk wiping/Tampa hands

note that it was

IN MX 20 grosley.wikimedia.org.

for donate-lb though

Jeff would know if we need a replacement

Change-Id: Ie19983d21aa5937ca695178ce5a69255390ba650
Merge "remove grosley (decom)"