BUG 1833 : Remove all unused code from sal-clustering-commons

Change-Id: I7ce05b4ee77b6151f361091b18d1a7bbd8ed408a
Signed-off-by: Moiz Raja <moraja@cisco.com>
(cherry picked from commit 4861f2406206bf208a07a703ad8d6808072c6e45)