clone-haproxies: Simplify.
Remove the HAPRoxy 1.3 and 1.4 repositories.

They're missing tags (e.g. v1.3.25) that exist in the main development repo,
and I'm unable to pull them.  I see error messages like:

  error: object directory /home/ben/src/collections/oss-collections/load-balancers/.git/modules/haproxies/modules/haproxy/objects does not exist; check .git/objects/info/alternates.
  error: refs/tags/v1.3.25 does not point to a valid object!

and:
Update haproxy.