zziplib: gdraheim/zziplib#27 is not an issue anymore

fix included in 0.13.69, which was bumped in
3f36f6095fef0b83b9e8f5fc9d0b8ad42dfccaa6.

pkgs/development/libraries/zziplib/default.nix

···
     sed -i -e s,--export-dynamic,, configure
   '';
 
-  # TODO: still an issue: https://github.com/gdraheim/zziplib/issues/27
-
   buildInputs = [ docbook_xml_dtd_412 perl python2 zip xmlto zlib ];
 
   # tests are broken (https://github.com/gdraheim/zziplib/issues/20),