LU-2675 llite: remove dead code

LU-2675 llite: remove dead code

In llite remove unused declarations, parameters, types, and unused,
get-only, or set-only structure members. Add static and const
qualifiers to declarations where possible.

Signed-off-by: John L. Hammond <john.hammond@intel.com>
Change-Id: If710247d11debd748d2efe80e400f208066cbafa
Reviewed-on: http://review.whamcloud.com/9767
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Lai Siyao <lai.siyao@intel.com>
Reviewed-by: Jinshan Xiong <jinshan.xiong@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>