Bug#1055028: do not create po statistic for all language combinations

Package: www.debian.org

Currently we generate several hundereds of files in international/l10n/po/
A lot of them are around 2.2M big.

We have an overall of 8700 files in this directory.
Do we really need statistic like these? For e.g.
/international/l10n/po/de@hebrew
/international/l10n/po/sa.de.html

We should review if we really need all these files in there.

The directory currently needs 2.2 GB disk space.