staging/lustre/obdclass: Remove unused nid_hash

nid_hash is used on export to faster find clients based on
their NID. There's no use for that on the client.

Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 files changed