remove mw1163 from dsh, broken memory

RT #6741: mw1163 dmesg output shows memory errors

09:22  cmjohnson1 !log shutting down mw1163 to replace DIMM

<+icinga-wm> PROBLEM - Host mw1163 is DOWN: PING CRITICAL - Packet loss = 100%

if these stay in dsh while being down then
deployers will get errors during scap and ask us what's up
with that

please _revert_ this after hardware is fixed

Change-Id: I05af644d085d6ca998ca2e6214f1e8a21537990d