sim: or1k: drop unused rules
These rules are the same as the common ones, so drop them to simplify.
diff --git a/sim/or1k/Makefile.in b/sim/or1k/Makefile.in
index 9ce4680..6b2a976 100644
--- a/sim/or1k/Makefile.in
+++ b/sim/or1k/Makefile.in
@@ -46,18 +46,6 @@
arch = or1k
-or1k.o: or1k.c
- $(COMPILE) $<
- $(POSTCOMPILE)
-
-sim-if.o: sim-if.c
- $(COMPILE) $<
- $(POSTCOMPILE)
-
-traps.o: traps.c
- $(COMPILE) $<
- $(POSTCOMPILE)
-
stamps: stamp-arch stamp-cpu
# NOTE: Generated source files are specified as full paths,
