staging: lustre: include: remove unused macros

OBD_CHECK_DEV and OBD_CHECK_DEV_ACTIVE have been replaced by static
inline functions. They are removed since they are not used anymore.

Signed-off-by: Aya Mahfouz <mahfouz.saif.elyazal@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>