distro_info: read the YAML local series path, drop the dead dist_info stanza

distro_info.yml

@@ -3,10 +3,9 @@
 ## update and maintain such data in one unique place
 ## The goal is to have the minimal possible set of data necessary
 ## to grab the actual data. For example we don't want to store every Ubuntu
-## or Debian series, but rather an URL where we can properly access that data.
-dist_info:
-  local: /usr/share/distro-info/{dist}
-  network: https://salsa.debian.org/debian/distro-info-data/-/raw/main/
+## or Debian series, but rather pointers to where that data lives: each dist
+## entry below carries its series sources (the local distro-info CSV, with
+## the network URL as fallback).
 dist:
   debian:
     base_url: https://deb.debian.org/debian