fuzz-tests: Remove unnecessary #includes in the BOLT #11 test

The fuzz target for BOLT #11 has some unnecessary #includes.
Get rid of them.

Author: Chandra Pratap

tests/fuzz/fuzz-bolt11.c

@@ -1,15 +1,11 @@
 #include "config.h"
 
-#include <bitcoin/chainparams.h>
 #include <bitcoin/privkey.h>
 #include <common/bech32.h>
 #include <common/bolt11.h>
-#include <common/features.h>
 #include <common/setup.h>
 #include <common/utils.h>
-#include <stddef.h>
 #include <stdint.h>
-#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <tests/fuzz/libfuzz.h>