delete empty pmtpa dsh files, remove mw10,mw40,db10

get rid of dsh group cruft, mw10,mw40,db10 are already dead
the other files are empty

Change-Id: I6fe815bfe77fa26c0a2ab11b1f412e898a89410d
Merge "delete empty pmtpa dsh files, remove mw10,mw40,db10" into production