sh: nommu: Kill off dummy page fault ops for SH-3/4.

We stopped referencing these functions unconditionally when the
old entry.S code was refactored, so this is just dead code at
present. Kill it off.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

diff --cc arch/sh/mm/Makefile
Simple merge

diff --cc arch/sh/mm/fault-nommu.c
Simple merge