x86: clean up dead code in vmi_32.c

Impact: cleanup, remove dead debug code

I ran across some old debugging code in vmi paravirt-ops code that was
already dead, but still potentially useful.  After reviewing recent
changes to the way kernel page tables are allocated and initialized, and
the lack of bugs caught by this debugging code, I've concluded it is now
totally useless to have around, and it's already been #if 0'd for quite
some time.

There's no rush to get this in mainline, but it's also totally harmless,
so I'll let the x86 maintainers decide where it should be tucked.  I've
been out of the mainstream dev loop for a couple months, so apologies if
I haven't got any protocol changes in order.

Remove mummified remains found in vmi_32.c

Signed-off-by: Zachary Amsden <zach@vmware.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>