zpaq: remove unused .upstream file

Changed files
-3
pkgs
tools
archivers
-3
pkgs/tools/archivers/zpaq/default.upstream
···
-
url http://mattmahoney.net/dc/zpaq.html
-
version_link "/zpaq[0-9]+[.]zip"
-
version "[^0-9]*([0-9]+)[^0-9]*" '\1'
···