baremetal: get exit status working with on_exit :-)

lkmc/assert_fail.c

@@ -1,21 +1,5 @@
 #include <lkmc.h>
 
-#include <stdio.h>
-
-void atexit_cb(void) {
-    puts("atexit");
-}
-
-void onexit_cb(int status, void *arg) {
-    printf("status %d\n", status);
-}
-
-void __attribute__ ((constructor)) premain() {
-    printf("premain2()\n");
-}
-
 int main(void) {
-    atexit(atexit_cb);
-    on_exit(onexit_cb, NULL);
     lkmc_assert_fail();
 }