libnfsidmap: drop old unused package

BUG=None
TEST=CQ passes

Change-Id: I92628105c5ee5a4d945d155091047d60caa48e05
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/2935559
Reviewed-by: Chirantan Ekbote <chirantan@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
5 files changed