Remove mem.s from the build.

* This is unneeded, we can ignore the BASIc when started with run""
directly. Instead we can size the heap using progend and the AMSDOS ROM
bottom.
diff --git a/contiki-cpc/Makefile.cpc b/contiki-cpc/Makefile.cpc
index aa80d78..4bca72a 100644
--- a/contiki-cpc/Makefile.cpc
+++ b/contiki-cpc/Makefile.cpc
@@ -61,7 +61,6 @@
 CONTIKI_OBJ= ./arch/crt0.o \
 	./loader/rel.o \
 	./arch/key.o \
-	./arch/mem.o \
 	./arch/malloc.o \
 	./arch/clock.o \
 	./loader/dir.o \
@@ -105,7 +104,7 @@
 
 contiki: $(CONTIKI_OBJ)
 	$(LD) -f arch/contiki.lnk
-	#./bin/make_labels -a _CODE -a _DATA -x _main -x __clock -x _exit contiki.map arch/contiki_labels.s
+	./bin/make_labels contiki.map arch/contiki_labels.s
 	makebin -p -s 65535 < contiki.ihx > contiki.raw
 	dd if=contiki.raw of=contiki.bin bs=256 skip=1
 	cpcfs contiki.dsk f
diff --git a/contiki-cpc/arch/contiki.lnk b/contiki-cpc/arch/contiki.lnk
index 42d2f85..3d2f197 100644
--- a/contiki-cpc/arch/contiki.lnk
+++ b/contiki-cpc/arch/contiki.lnk
@@ -4,7 +4,6 @@
 -l z80
 ./arch/crt0.o
 ./arch/key.o
-./arch/mem.o
 ./arch/malloc.o
 ./arch/clock.o
 ./loader/loader-arch-cpc.o