admin yaml vanadium.eqiad.wmnet

per nuria in irc today she no longer needs access:

chasemp
hi!
chasemp
are you still using vanadium.eqiad.wmnet?
chasemp
this is Chase from WMF btw
chasemp
howdy
nuria
no, not anymore
chasemp
okay thanks!

Change-Id: Ic618cd1fe330b80e8a5bdcd35635a793d8f6c714