[rdial] Drop Python 3 support

Dependencies are broken when not using kinesis.  It sucks, but it isn't worth
the hassle to fix upstream.

Package-Manager: portage-2.1.12.2
Manifest-Sign-Key: C0174749
[freshen] Use virtual/pyparsing to handle weird pyparsing slots

Package-Manager: portage-2.1.12.2
Manifest-Sign-Key: C0174749