LU-9120 lnet: remove obsolete health functions

LU-9120 lnet: remove obsolete health functions

Removed obsolete health functions that were originally added
during the Multi-Rail project. Some assumptions were made about
the health implementation back then, that are no longer true.

Test-Parameters: forbuildonly
Signed-off-by: Amir Shehata <ashehata@whamcloud.com>
Change-Id: I4d4f47a03541d58da6807d9c2b786ecd868b50b0
Reviewed-on: https://review.whamcloud.com/32862
Tested-by: Jenkins
Reviewed-by: Sonia Sharma <sharmaso@whamcloud.com>
Reviewed-by: Olaf Weber <olaf.weber@hpe.com>