Revert "added busy loop to see cpu spike"

This reverts commit fa0ce03c4a.

fork_bomb/fork_bomb.c

@@ -289,9 +289,8 @@ int main(void)
     }
 
     if (pid == 0) {
-      for (;;) { // busy loop to keep child processes alive
-        asm volatile("" ::: "memory");
-      }
+      pause();
+      return 0;
     }
 
     count++;