FreeBSD: remove some massif regtest expecteds

FreeBSD: remove some massif regtest expecteds

These were added mainly to have a cleanish slate with GCC on FreeBSD.
Unfortunately FreeBSD doesn't have dependent packages, so no debuginfo
for libstdc++ and the GCC port libstdc++ is stripped. That means that
the filters for internal GCC allocations don't work.

Since I hardly use GCC any more I'm getting rid of these expecteds.