Remove #define _BITSIZE 32.

I've no idea what _BITSIZE was supposed to be, glibc doesn't have it,
the BSDs don't have it, and no code is currently using it. But having
it set unconditionally to 32 sounds like a bad idea.

Change-Id: I900235c1489afba891fff0bc3b43e9d593249a4f
1 file changed