make: unifdef for MAKETOOL and DISTRIBUTED (undefined)

@@ -12,11 +12,10 @@
 # Copyright 2015, Richard Lowe.
 
 PROG=   make
 OBJS=   ar.o            \
         depvar.o        \
-        dist.o          \
         doname.o        \
         dosys.o         \
         files.o         \
         globals.o       \
         implicit.o      \