- remove deprecated GNATS references

Differential Revision:	https://reviews.freebsd.org/D1056
Approved by:	bapt, bcr (mentor)


git-svn-id: svn+ssh://svn.freebsd.org/doc/head@45934 c2e8774f-c49f-e111-b436-862b2bbc8956
- remove deprecated GNATS references

Differential Revision:	https://reviews.freebsd.org/D1059
Reviewed by:	remko, wblock (mentors)
Approved by:	wblock (mentor)


git-svn-id: svn+ssh://svn.freebsd.org/doc/head@45935 c2e8774f-c49f-e111-b436-862b2bbc8956