"The unifdef utility exits 0 if the output is an exact copy of the input,
1 if not, and 2 if in trouble."
This causes an 'Error code 1 (ignored)' in the world output, which upsets
the whereintheworld scripts that the tinderboxes use.
However, this stuff here is a relic. We do not enable HAVE_TCL_INTERP
nor HAVE_PERL_INTERP.. The Makefile hooks to turn them on have gone ages
ago, and this stuff was here for release building purposes only. Rather
than fight with the tinderbox builds, clean house a bit and remove the
last remaining unused relics of this stuff.
3668c296f2