glob.h: Remove $FreeBSD$

This likely documented where this file was copied, but the $FreeBSD$
tag was lost as soon as it was committed. Just remove it. Also remove
the one that looked like it was intended to track versions. That will
simplify the MFC.

Sponsored by: Netflix

(cherry picked from commit c25155762166bd03329667e525b2e2c1253a4d6a)