audio/openal, the OpenAL Sample Implementation, is ancient and
unmaintained upstream. It should probably be removed. I doubt
many people are using it. According to Repology FreeBSD is one of
the last few systems to even distribute it [1]. Applications
probably expect audio/openal-soft in many cases too nowadays.
[1] https://repology.org/project/openal-creative/versions
[2] http://www.openal.org/links/