Remove postgis_tiger_geocoder and address_standardizer from the PostGIS code base

[Regina Obe]

> > How badly will this mess up work of packagers?
> 
> It will take some work, but in general having separate things separate is
good.
> A user might want one and not the other, and it's far cleaner to have 3
> packages for 3 things, even if B and C depend on A.
> 
> Being in a separate repo (separate release tarballs really) is fine.  It
is also ok
> to be in a subdir of the main tarball with a disjoint build system.
> 
> What's awkward is things being optional and having extra deps, so that you
> have to decide at postgis build time if you want them or not.
> 
> 
> So while there's some short-term work, this sounds like a very good change
to
> me.

Thanks for the feedback.  I was thinking that too.