doc: Drop corrupted and unused file

Change-Id: Ib220f9264ac941e87a9eb0998775a1b5507c510f
Signed-off-by: Lubomir Rintel <lubo.rintel@gooddata.com>
Reviewed-on: http://review.gluster.org/5478
Reviewed-by: Vijay Bellur <vbellur@redhat.com>
Tested-by: Vijay Bellur <vbellur@redhat.com>