po4a: drop unused package

This was only used by man-db[nls] which we've turned off.

BUG=b:248739853
TEST=CQ passes

Cq-Depend: chromium:3917219
Change-Id: I489a65e9fbe4ba563419e359c68b3b7a1dde28ed
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/3915261
Commit-Queue: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Alex Klein <saklein@chromium.org>
41 files changed