GFS2: Remove ancient, unused code

Remove code that used to have something to do with initrd
but has been unused for a long time.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

diff --cc fs/gfs2/mount.c
Simple merge

diff --cc fs/gfs2/sys.c
Simple merge

diff --cc fs/gfs2/sys.h
Simple merge