Remove outdated message about macOS in 1985/applin

I fixed this quite some time back but never removed the warning. Test
compiling everything in the new macOS I discovered this and other
problems which will have to be looked at later.

1985/applin/Makefile

@@ -128,7 +128,6 @@ all: data ${TARGET}
 	supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
-	@echo "NOTE: this does not work properly in macOS."
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}
 
 # alternative executable