According to feature-removal-schedule.txt, it is the time to remove
print_fn_descriptor_symbol().

And a quick grep shows that it no longer has any callers.
Signed-off-by: NWANG Cong <amwang@redhat.com>
Cc: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>