remove special ttyaction hook from etc/etc.sun[23]/Makefile.inc, it's no longer
needed
ld.so.conf is ${MACHINE}-specific, the code happened to work for i386 and sparc
only because ${MACHINE} == ${MACHINE_ARCH} there
remove basesrc/etc/ld.so.conf and its special vax/ns32k/m68k hook in Makefile -
vax & m68k are ELF now, and ns32k doesn't need to be handled here