Some delete-old detrius

doing a delete-old run:
drwxr-xr-x  2 root  wheel  25 Sep 18 22:55 usr/lib/debug/usr/lib/i18n
rm: usr/bin/indent/tests/nsac.0: Not a directory
rm: usr/bin/indent/tests/nsac.0.pro: Not a directory
rm: usr/bin/indent/tests/nsac.0.stdout: Not a directory
rm: usr/bin/indent/tests/sac.0: Not a directory
rm: usr/bin/indent/tests/sac.0.pro: Not a directory
rm: usr/bin/indent/tests/sac.0.stdout: Not a directory
rm: usr/lib/debug/usr/lib/i18n: is a directory
	

I'm not clear on how long we leave stuff lying around in Obsolete or
whatever before we purge them.  Is this output with us forever?

sean