ocfs2: remove unused code

Remove node messaging code that becomes unused with the delete inode vote
removal.

[Removed even more cruft which I spotted during review --Mark]

Signed-off-by: Tiger Yang <tiger.yang@oracle.com>
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>

diff --cc fs/ocfs2/inode.c
Simple merge

diff --cc fs/ocfs2/inode.h
Simple merge

diff --cc fs/ocfs2/vote.c
Simple merge

diff --cc fs/ocfs2/vote.h
Simple merge