remove links from bk to get rid of warnings on windows

BitKeeper/deleted/.del-sql_state.c~3b39d30b649690f3:
  Delete: server-tools/instance-manager/sql_state.c
BitKeeper/deleted/.del-password.c~9d4b6a4c57887ac7:
  Delete: server-tools/instance-manager/password.c
BitKeeper/deleted/.del-pack.c~4754cd15e3058c75:
  Delete: server-tools/instance-manager/pack.c
BitKeeper/deleted/.del-net_serv.cc~120fb81d7e670308:
  Delete: server-tools/instance-manager/net_serv.cc