[PATCH:libSM] Stop compiling empty sm_auth.c stub

[Adam Jackson]

On Sat, 2013-11-16 at 20:43 -0800, Alan Coopersmith wrote:
> File exists as a placeholder in case someone someday decides to add
> additional auth methods on top of what libICE provides, but it's been
> two decades and no one has, so stop spending time compiling & linking
> for now.
> 
> Signed-off-by: Alan Coopersmith <alan.coopersmith at oracle.com>

Sure.  I'd go ahead and nuke it (and you can consider this a preemptive
r-b for that change too), but:

Reviewed-by: Adam Jackson <ajax at redhat.com>

- ajax