- Remove all references to defunct ARCH arm
- Remove all references to defunct ARCH sparc64
- Remove x11-drivers/xf86-video-sunffb which requires defunct sparc64
ARCH
- Remove sysutils/afbinit requires defunct sparc64 ARCH
- Remove all references to bktr driver
- Remove all references to defunct FreeBSD_12
- Remove all references to OSVERSION corresponding to 12