MT#62325 Remove support for Debian bullseye release and older

We do not need this support, as trunk is based on bookworm, and we are
transitioning to trixie.

Change-Id: I9c0a47c12edae2f178c610708040c8669224a266

lib/set_debian_info

@@ -21,10 +21,6 @@
     unless length $debian_version;
 
   my %versions = (
-    8 => 'jessie',
-    9 => 'stretch',
-    10 => 'buster',
-    11 => 'bullseye',
     12 => 'bookworm',
     13 => 'trixie',
   );