HW Relnotes template: Remove drivers out since 13

The aha, bt, dpt, ncr, ncv, nsp, stg, trm, and vpo drivers were removed
in FreeBSD 13.

Ref: src: 48ac1a9566c7839091 (Remove the gone_in(12) devices)
Ref: src: 33ce28d13795b4972d (Remove the trm(4) driver)
Ref: src: 51691e26d064213533 (Remove vpo.4)