PAX ASLR: same as lattera's previous commit, remove the unneeded copy of
p_pax in kern_fork.c which caused by mismerge

same, as this https://github.com/HardenedBSD/hardenedBSD/commit/87dc1d6a5935608b7205434df5a938d7ab4c8619#diff-e662288c52f0db0e770ca64276fa4d40R564

Signed-off-by: Oliver Pinter <oliver.pntr@gmail.com>