stand: Kill commented out line

This line is no longer needed as fallback, and should have been deleted
in 7870a52598ad8 instead of commented out, but 26 years later, I have a
high degree of confidence that old change was right and we won't need
this line as a fallback.

Sponsored by: Netflix
Reviewed by: kevans, jhb
Differential Revision: https://reviews.freebsd.org/D45880