Remove from hardware notes devices removed from the 13.0 release

10/100 Ethernet drivers like de, ed, ep, ex, etc. and other drivers were
removed from FreeBSD in 13.0, but they were still included in the 13.0
hardware notes; remove them now.

While there is not a great deal of value in updating this after 13.0 is
past EOL it is a small improvement in consistency and the list of
drivers was already available in the referenced PR.

PR: 255053
Reviewed by: bcr
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D40675